CRITICAL AND CREATIVE THINKING TEST ITEMS CLASS X SUB: SCIENCE CHAPTER-13 : MAGNETIC EFFECTS OF ELECTRIC CURRENT INDEX S.N o: Topic Page Number 1 Deflection of Compass Needle 2 Magnetic Field 3 Magnetic Field due to a loop 4 Domestic Electric Circuit 5 Electromagnetic Induction 6 A.C. Generator 7 Electric Motor 8 DC Motor 9 Magnetic Field 10 Electromagnetic Induction 11 Electromagnet: Application in our daily Life 12 Faraday’s Law of Induction 13 Miracle of Magnet 14 DC Motor 15 Delhi Factory Fire Tragedy (2019)
Transcript
CRITICAL AND CREATIVE THINKING TEST ITEMS
CLASS X SUB: SCIENCE CHAPTER-13 : MAGNETIC EFFECTS OF ELECTRIC CURRENT
INDEX
S.No:
Topic Page Number
1 Deflection of Compass Needle2 Magnetic Field3 Magnetic Field due to a loop4 Domestic Electric Circuit5 Electromagnetic Induction6 A.C. Generator7 Electric Motor8 DC Motor9 Magnetic Field
10 Electromagnetic Induction11 Electromagnet: Application in our daily Life12 Faraday’s Law of Induction13 Miracle of Magnet 14 DC Motor15 Delhi Factory Fire Tragedy (2019)
CLASS X -SCIENCE
CHAPTER 13CCT TEST ITEM – MAGNETIC EFECT OF CURRENT
Test Item:-1Deflection of Compass Needle
In the given activity current flow through the copper wire and compass needle show deflection. After some time, we change the directions of flow of current and observe the effect of needle deflection. Needle deflection direction is changed.
Q. 1.What conclusion draw when compass needle deflect after flow of current in a copper wire?
Ans—Current carrying wire produces magnetic field around it which exerts force on the magnetic needle so it gets deflected.Full credit ---above answer. No credit ---any other answer
Q.2.Change in the direction of Needle deflection indicates that when the direction of current in the copper wire changes or reverses, direction of magnetic field also changes in opposite direction.Full credit --above answer.No credit -any other.
Test Item—2Magnetic Field
In the given current flows the straight conductor v
Q.1. what changes you see on flowing the current in straight
Wire ?Answer -When current flows in straight conductor it produces magnetic field around it in the circular forms. Full credit - above answer. No credit -any other.Q .2 On changing the direction of current in the conductor indicates that direction of magnetic field lines also changes . Full credit –above answer. No credit -any other answer.
Test Item -3Magnetic Field due to a loop
Q. 1.what is the effect of flowing of current in circular loop? Answer –Two poles are produced in the loop on flowing the current in it. It behaves as a magnet.
Full credit - above answer.No credit –any other answer.
Q.2.Direction of magnetic field lines in the upward direction normal to the plane of the loop indicates ----current flowing the loop is anticlockwise and lower face of loop is s-pole and upper face is n-pole.Full credit –above answer.No credit -any other answer.
Test Item-4Domestic Electric Circuit
Q. 1.Where is the main fuse connected in the domestic electric circuit ?Ans. The main fuse is connected in the live wire coming from out coming terminal of the meter. Full credit- above answerNo credit- any other answer
Q.2. How the appliances are connected in domestic electric circuit ?Ans. All the appliances are connected in parallel so that they work at the same potential. The connection from the live wire is taken to the one terminal of the appliance through a switch and other terminal of the appliances is connected to the neutral wire.Full credit- above answerNo credit- any other answer
Test Item—5
Electromagnetic Induction
Q. 1. What is the function of the galvanometer in a circuit ?Ans. Galvanometer detects the presence of current in any circuit.Full credit- above answerNo credit- any other answer
Q.2. phenomenon of the electromagnetic induction indicates ------- when there is a change in the magnetic field line number through a coil or the circuit, an induced current flow in the circuit and it lasts as long as there is a change in the magnetic field lines passing through the coil.Full credit- above answerNo credit- any other answer
Test Item –6A.C.Generator
Q. 1.Name the device in the figure and on which principle works ?Ans. A.C Generator and it works on the electromagnetic induction principle.Full credit- above answerNo credit- any other answer
Q. 2.what is the nature of the current produced by AC generatorAns. It produces the alternating current which changes both in magnitude and direction periodically after half cycle.Full credit- above answerNo credit- any other answer
Test Item-7Electric Motor
Q. 1. What is the function of the electric motor?Ans. It converts electrical energy into mechanical energy.Full credit- above answerNo credit- any other answer
Q. 2. What is the role of the split rings ?Ans. Split rings reverse the direction of current in the rectangular coil. Full credit- above answerNo credit – any other answer.
Test Item –8Magnetic Field
Q. 1. what do you mean by magnetic field lines ?Ans. The path [ straight or curved] along which a unit north pole moves in a magnetic field is called magnetic field line.Full credit- above answerNo credit- any other answer
Q.2. Why the magnetic field lines never intersect each other ?Ans. Because if they intersect than there will be the two tangents at that point and so there will be the two directions of the same magnetic field at that point which cannot be possible. Full credit- above answerNo credit- any other answer
Test Item : 1Electromagnetic Induction
Moving a coil across a magnetic field will produce a current (See the image below). This is called electromagnetic induction. The direction of the current depends on how the coil is moved. The current produced in called the induced current.
1. The wire is wound over the iron rod. What we call it scientifically?………………………………………………………………………………………………………………………….
2. What will be the direction of field lines between N and S pole of magnet shown in the image?……………………………………………………………………………………………………………………………
3. How can we say that current is produced in the experimental set up shown in image?……………………………………………………………………………………………………………………………
4. Is there any way to know the direction of induced current?…………………………………………………………………………………………………………………………...
5. What will be the direction of induced current?…………………………………………………………………………………………………………………………..
Learning outcomes: Students will be able to explain phenomena of electromagnetic induction
Scientific LiteracyFramework System CharacteristicsCompetency Explain phenomena scientificallyKnowledge system PhysicalContext GlobalCognitive demand LowerItem format Short responseProficiency level 2
Credit Pattern:Full credit: 1No Credit:0Description of answer key and credits:
1.1 full credit: SolenoidN0 credit :any other response
Learning outcomes: Students will be able to explain phenomena of electromagnetic induction
Scientific LiteracyFramework System CharacteristicsCompetency Explain phenomena scientificallyKnowledge system PhysicalContext GlobalCognitive demand LowerItem format Short responseProficiency level 2
Credit Pattern:Full credit : 1No Credit:0
Description of answer key and credits:1.2 full credit: North to south
Learning outcomes: Students will be able to explain phenomena of electromagnetic induction
Scientific LiteracyFramework System CharacteristicsCompetency Explain phenomena scientificallyKnowledge system PhysicalContext GlobalCognitive demand LowerItem format Short responseProficiency level 2
Credit Pattern:Full credit : 1No Credit:0Description of answer key and credits:
1.3 full credit: Deflection of GalvanometerN0 credit : any other response
Learning outcomes: Students will be able to explain phenomena of electromagnetic induction
Scientific LiteracyFramework System CharacteristicsCompetency Explain phenomena scientificallyKnowledge system PhysicalContext GlobalCognitive demand MediumItem format Short responseProficiency level 3
Credit Pattern:Full credit : 1No Credit:0
Description of answer key and credits:
1.4 full credit: Dynamo rule or Fleming’s ( Left )Hand RuleN0 credit : any other response
Learning outcomes: Students will be able to explain phenomena of electromagnetic induction.
Scientific LiteracyFramework System CharacteristicsCompetency Explain phenomena scientificallyKnowledge system PhysicalContext GlobalCognitive demand MediumItem format Short responseProficiency level 3
Credit Pattern:Full credit : 1No Credit:0
Description of answer key and credits:1.5 full credit: (Perpendicular to the plane ) outward
N0 credit : any other response
Name of teacher :Amita AroraDesignation : TGT (Science)E- mail: [email protected] no. – 8561987719Name of Vidyalaya – K.V. No. 6 JaipurKVS Region - Jaipur
Test Item 2ELECTROMAGNET: APPLICATION IN OUR DAILY LIFE
Electromagnetic phenomena are definedin terms of the electromagnetic, sometimes called the Lorentz force, which includes both electricity and magnetism as different manifestations of the same phenomenon. The electromagnetic force plays a major role in determining the internal properties of most objects encountered in daily life.Identify the device in the word search puzzle. Who am I ?
1. It is used to produce the audio output that can be heard by the listener……………………………2. It captures audio by converting sound into electrical signals……………………….3. It converts electrical energy into mechanical energy……………………………4. It converts mechanical energy into electrical energy……………………………5. It uses magnetic storage to store and retrieve digital data in computers. ………………………………6. It uses a large magnet and radio waves to look at organs and structures inside body……………………7. It is used to pick up and move metals containing things such as steel and iron…………………..8. It is used to make and receive telephone calls, text messages………………………………9. It is means of transportation that uses two sets of magnets…………………………….10. It is a signaling device typically placed near a door to a building’s entrance…………………………….
Scoring Test Item : 2
Domain : Scientific Literacy Theme: Electromagnet: Application in daily life
Class:XExpected time:20 min
Total Credits : 10Description of item:
Text : Electromagnet: Application in daily life
Learning outcomes: Students will understand the application of electromagnet in our daily life.
Students will identify the phenomenainvolvedin various devices used in our daily life
Scientific LiteracyFramework System CharacteristicsCompetency Evaluate and design scientific enquiryKnowledge system PhysicalContext GlobalCognitive demand LowerItem format Short responseProficiency level 2
Credit Pattern:Full credit : 1No Credit:0Description of answer key and credits:
2.1full credit: SpeakerN0 credit : any other response2.2 full credit: MicrophoneN0 credit : any other response2.3 1full credit: MotorN0 credit : any other response2.4 full credit: GeneratorN0 credit : any other response2.5 full credit: Hard diskN0 credit : any other response2.6 full credit: MRI ScannerN0 credit : any other response2.7 full credit: CraneN0 credit : any other response2.8 full credit: PhoneN0 credit : any other response2.9 full credit: Magvel TrainN0 credit : any other response2.10 full credit: DoorbellN0 credit : any other response
Name of teacher :Amita Arora
Designation : TGT (Science)E- mail: [email protected] no. – 8561987719Name of Vidyalaya – K.V. No. 6 JaipurKVS region - Jaipur
It is the basic law of electromagnetism predicting how a magnetic field will interact with an electric circuit to produce an electromotive force- a phenomenon known as electromagnetic induction. It is the fundamental operating principle of transformers, inductors, and many types of electrical motors, generators and solenoids.
1. What will be observed in galvanometer during movement of magnet and coil?……………………………………………………………………………………………………………………………………
2. When North pole approached coil, deflection occurred in left. Where will the needle of galvanometer deflect(direction), when South pole residing away from coil?…………………………………………………………………………………………………………………………………….
3. What is the term used to the change in the number of magnetic field lines linked with the coil?…………………………………………………………………………………………………………………………………….
4. When the no. of turns in the coil in the figure above doubled, what will be the effect on the deflection in galvanometer?……………………………………………………………………………………………………………………………………
ScoringTest Item 3
Domain : Scientific Literacy Theme:Faraday’s Law of Induction
Class:XExpected time:1 min
Total Credits : 1Description of item:
Text : combustion of carbon compounds
Image : graph of specific carbon dioxide emissions of
various fuels
Learning outcomes: Students will understand the law of Electromagnetic induction.
Scientific LiteracyFramework System CharacteristicsCompetency Explain the phenomena scientificallyKnowledge system PhysicalContext GlobalCognitive demand LowerItem format Short responseProficiency level 2
Credit Pattern:Full credit: 2No Credit:0
Description of answer key and credits:3.1 full credit: Deflection
N0 credit : any other response
Domain : Scientific Literacy Theme: Faraday’s law of induction
Class:XExpected time:3 min
Total Credits : 1Description of item:
Text : combustion of carbon compounds
Image : graph of specific carbon dioxide emissions of
various fuels
Learning outcomes: Students will understand the law of Electromagnetic induction.
Scientific LiteracyFramework System CharacteristicsCompetency Explain phenomena scientificallyKnowledge system PhysicalContext GlobalCognitive demand MediumItem format Short responseProficiency level 3
Credit Pattern:Full credit : 1No Credit:0Description of answer key and credits:3.2 full credit: towards left
N0 credit : any other response
Domain : Scientific Literacy Theme: Faraday’s Law of Induction
Class: XExpected time:2 min
Total Credits : 1Description of item:
Text : combustion of carbon compounds
Image : graph of specific carbon dioxide emissions of
various fuels
Learning outcomes: Students will understand the law of induction.
Scientific LiteracyFramework System CharacteristicsCompetency Explain phenomena scientificallyKnowledge system PhysicalContext GlobalCognitive demand LowerItem format Short responseProficiency level 2
Credit Pattern:Full credit : 1No Credit:0
Description of answer key and credits:
3.3 full credit: Magnetic fluxN0 credit : any other response
Domain : Scientific Literacy Theme: Faraday’s law of Induction
Class:XExpected time:3 min
Total Credits : 1Description of item:
Text : combustion of carbon compounds
Image : graph of specific carbon dioxide emissions of
various fuels
Learning outcomes: Students will understand the law of induction.
Scientific LiteracyFramework System CharacteristicsCompetency Explain phenomena scientificallyKnowledge system PhysicalContext GlobalCognitive demand MediumItem format Short responseProficiency level 3
Credit Pattern:Full credit : 1No Credit:0
Description of answer key and credits:3.4 full credit: more deflection in galvanometerN0 credit : any other response
Name of teacher :Amita AroraDesignation : TGT (Science)E- mail: [email protected] no. – 8561987719Name of Vidyalaya – K.V. No. 6 JaipurKVS region - Jaipur
MIRACLE OF MAGNETA magnet is a material or object that produces a magnetic field. This magnetic field is invisible but is responsible for the most notable property of a magnet: A force that pulls on other ferromagnetic materials, such as iron, and attracts or repels other magnets.Some materials, such as chromium, showed paramagnetism, being capable of weak induced magnetization when brought near a magnet.This magnetization disappears when the magnet is removed . Only three elements iron, nickel and cobalt , showed the property of ferromagnetism(i.e., the capability of remaining permanently magnetized).
1. What kind of magnet is shown in image ?……………………………………………………………………………………………………………………………..2. Rajesh observed more magnetic field lines near poles. What does it indicate ?……………………………………………………………………………………………………………………………….3. Shruti was playing with bar magnet and iron nails. She observed that iron nail get attracted towards magnet. She found that that iron nail could attract other nails too.Why this happened?…………………………………………………………………………………………………………………………………….4. Will Shruti observe same when she use the following things in place of iron nail.
S. No. Things in place of iron nail Will it get magnetizedYES/ NO
1 Copper wire2 Silver coin3 Zip of school bag4 Pressure cooker
Scoring
Test Item : 4Domain : Scientific Literacy Theme: Miracle of Magnet Class:X
Expected time:1 minTotal Credits : 1
Description of item:Text : Miracle of magnet
Image : Magnetic field lines
Learning outcomes: Students will be able to understand the directive property of magnet.
Students will be able to differentiate between Ferro and para magnetic material.
Scientific LiteracyFramework System CharacteristicsCompetency Explain phenomena scientificallyKnowledge system PhysicalContext GlobalCognitive demand LowerItem format Short responseProficiency level 1
Credit Pattern:Full credit: 1No Credit:0Description of answer key and credits:full credit: Ferromagnet N0 credit : any other response
Domain : Scientific Literacy Theme: Miracle of Magnet Class:XExpected time:2 min
Total Credits : 1 Description of item:
Text : Miracle of magnetImage : Magnetic field lines
Learning outcomes: Students will be able to understand the directive property of magnet.
Students will be able to differentiate between Ferro and paramagnetic material.
Scientific LiteracyFramework System CharacteristicsCompetency Explain phenomena scientificallyKnowledge system PhysicalContext GlobalCognitive demand LowerItem format Short responseProficiency level 2Credit Pattern:Fullcredit : 1
No Credit:0Description of answer key and credits:full credit: strong magnetic force No credit : any other response
Domain : Scientific Literacy Theme: Miracle of Magnet Class: XExpected time:3 min
Total Credits : 2Description of item:
Text : Miracle of magnetImage : Magnetic field lines
Learning outcomes: Students will be able to understand the directive property of magnet.
Students will be able to differentiate between Ferro and paramagnetic material.
Scientific LiteracyFramework System CharacteristicsCompetency Explain phenomena scientificallyKnowledge system PhysicalContext GlobalCognitive demand MediumItem format Short responseProficiency level 3Credit Pattern:Full credit: 2Partial credit: 1No Credit:0Description of answer key and credits:
4.1 Full credit: Iron shows ferromagnetism. Iron nails get magnetized when keep closer to magnet.Partial credit: Iron nail becomes magnet when kept closer to the magnet.
No credit : No or any other response
Domain : Scientific Literacy Theme: Miracle of Magnet Class: XExpected time:4 min
Total Credits : 4 Description of item:
Text : Miracle of magnetImage : Magnetic field lines
Learning outcomes: Students will be able to understand the directive property of magnet.
Students will be able to differentiate between ferro and paramagnetic material.
Scientific LiteracyFramework System Characteristics
Competency Explain phenomena scientificallyKnowledge system PhysicalContext GlobalCognitive demand LowerItem format Short responseProficiency level 2
Credit Pattern:Full credit : 4No Credit:0
Description of answer key and credits:4.2 full credit: NO,NO, YES, No
No credit : any other response
Name of teacher: Amita AroraDesignation : TGT (Science)E- mail: [email protected] no. – 8561987719Name of Vidyalaya – K.V. No. 6 JaipurKVS region - Jaipur
DC MOTORMotors that convert direct current electrical energy into mechanical energy. The most common types rely on the force produced by magnetic fields. Nearly all types of DC motors have some internal mechanism, either electromechanical or electronic , to periodically change the direction of current in part of the motor.
1. Which part of DC motor is moving to changing position in the motor?…………………………………………………………………………………………………………………..
2. At what angle will movable partrotate ?(i) 90 0( )(ii) 180 0 ( )(iii) 270 0 ( )(iv) 360 0. ( )
3. Is there any change in the working of motor if no. of turns in coil is increased ? …………………………………………………………………………………………………………………………4. Dinesh was collected different devices to see whether it has DC motor or not ?
S.No. Device DC motor Yes/ No1 Robot toy2 Washing machine3 Drone
Scoring TEST ITEM : 5
Domain : Scientific Literacy Theme: DC motor Class:XExpected time:3 min
Total Credits : 1Description of item:
Text : DC motorImage : DC motor
Learning outcomes: Students will understand the working of DC motor.
Scientific Literacy
Framework System CharacteristicsCompetency Explain the phenomena scientificallyKnowledge system PhysicalContext GlobalCognitive demand LowerItem format Short responseProficiency level 1
Credit Pattern:Full credit : 1No Credit:0
Description of answer key and credits:5.1 full credit: ArmatureN0 credit : any other response
Domain : Scientific Literacy Theme: DC motor Class: XExpected time:3 min
Total Credits : 1Description of item:
Text : DC motorImage : DC motor
Learning outcomes: Students will understand the working of DC motor.
Scientific LiteracyFramework System CharacteristicsCompetency Explain the phenomena scientificallyKnowledge system PhysicalContext GlobalCognitive demand LowerItem format Short responseProficiency level 1
Credit Pattern:Full credit : 1No Credit:0
Description of answer key and credits:5.2 full credit: 360 0
N0 credit : any other response
Domain : Scientific Literacy Theme: DC motor Class: XExpected time:3 min
Total Credits : 1Description of item:
Text : DC motorImage : DC motor
Learning outcomes: Students will understand the working of DC motor.
Scientific LiteracyFramework System CharacteristicsCompetency Explain the phenomena scientificallyKnowledge system PhysicalContext GlobalCognitive demand MediumItem format Short responseProficiency level 3
Credit Pattern:Full credit : 1No Credit:0
Description of answer key and credits:5.3full credit: Torque increasesN0 credit : any other response
Domain : Scientific Literacy Theme: DC motor Class:XExpected time:3 min
Total Credits : 3Description of item:
Text : DC motorImage : DC motor
Learning outcomes: Students will understand the working of DC motor.
Scientific LiteracyFramework System CharacteristicsCompetency Explain the phenomena scientificallyKnowledge system PhysicalContext GlobalCognitive demand LowerItem format Short responseProficiency level 2
Credit Pattern:Full credit: 3No Credit:0Description of answer key and credits:
5.4.1 .full credit: YesN0 credit : any other response5. 4.2 full credit: NoN0 credit : any other response5. 4.3 full credit: YesN0 credit : any other response
Name of teacher :Amita AroraDesignation : TGT (Science)E- mail: [email protected] no. – 8561987719Name of Vidyalaya – K.V. No. 6 JaipurKVS region - Jaipur
On 8 December 2019, a fire occurred at a factory building in Anaj Madi area of Delhi, India. At least 43 people died and more than 56 were injured. The fire started in a workshop that produced school bags and shoes. The Delhi Fire engines reached the location and extinguished the fire .The cause of the fire is being investigated; A preliminary investigation and eye witness claims have suggested an electrical short circuit may have been the cause.
1. What will be the cause of short circuiting?…………………………………………………………………………………………………………………………………2. As per information, why did it cause massive distraction to human life?……………………………………………………………………………………………………………………………….3. What should be the expected reasons of short circuit ?……………………………………………………………………………………………………………………………….4. Can we avoid such accidents? How?………………………………………………………………………………………………………………………………..
Scoring Test Item : 6
Domain : Scientific Literacy Theme: Delhi Factory fire Tragedy (2019)
Class: XExpected time:1 min
Total Credits : 1Description of item:
Text Delhi Factory fire tragedy (2019)
Learning outcomes: Students will understand the reason of short circuit.
Students will be able to apply safety measures to avoid short circuiting.
Scientific LiteracyFramework System CharacteristicsCompetency Interpreting data and evidences scientificallyKnowledge system PhysicalContext GlobalCognitive demand LowerItem format Short responseProficiency level 1
Credit Pattern:Full credit: 1No Credit:0
Description of answer key and credits:full credit: Live wire comes in contact of neutral wireN0 credit : any other response
Domain : Scientific Literacy
Theme: Delhi Factory fire Tragedy (2019)
Class: XExpected time:1 min
Total Credits : 1Description of item:
Text Delhi Factory fire tragedy (2019
Learning outcomes: Students will understand the reason of short circuit.
Students will be able to apply safety measures to avoid short circuiting.
Scientific LiteracyFramework System CharacteristicsCompetency Interpreting data and evidences scientificallyKnowledge system PhysicalContext GlobalCognitive demand LowerItem format Short responseProficiency level 1
Credit Pattern:Full credit : 1No Credit:0
Description of answer key and credits:full credit: workshop has combustible substances like bags.N0 credit : any other response
Domain : Scientific Literacy Theme: Delhi Factory fire Tragedy (2019)
Class:XExpected time:1 min
Total Credits : 2Description of item:
Text Delhi Factory fire tragedy (2019
Learning outcomes: Students will understand the reason of short circuit.
Students will be able to apply safety measures to avoid short circuiting.
Scientific LiteracyFramework System CharacteristicsCompetency Interpreting data and evidences scientificallyKnowledge system Physical
Context GlobalCognitive demand MediumItem format Short responseProficiency level 3Credit Pattern:Full credit : 2Partial credit : 1No Credit:0Description of answer key and credits:
6.1 full credit: old wiring/overloading /damaged electric cords(any two) or any relevant answerPartial credit : any one reason
N0 credit : any other response
Domain : Scientific Literacy Theme: Delhi Factory fire Tragedy (2019)
Class:XExpected time:2 min
Total Credits : 2Description of item:
Text Delhi Factory fire tragedy (2019
Learning outcomes: Students will understand the reason of short circuit.
Students will be able to apply safety measures to avoid short circuiting.
Scientific LiteracyFramework System CharacteristicsCompetency Interpreting data and evidences scientificallyKnowledge system PhysicalContext GlobalCognitive demand MediumItem format Short responseProficiency level 3
Credit Pattern:Full credit: 2Partial credit: 1No Credit:0Description of answer key and credits:
6.2 full credit: Replacing old wiring/qualified electrician/ no overloading outlets(any two ) or any other relevant reasonsPartial credit : any one answer from above
N0 credit : No or any other responseName of teacher :Amita AroraDesignation : TGT (Science)E- mail: [email protected] no. – 8561987719
