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Electrostatics Electric Materials

100

Electricroscope Electric Field

500

400

300

200

100 100 100 100

200 200 200 200

300 300 300300

400 400 400 400

500 500 500500

Electric Forces

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Electrostatics100 pts

How do charges interact with each other?

Like charges repelOpposite charges attract

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Electrostatics 100 ptsAnswer

What happens when a charged object approaches a neutral object?

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Electrostatics 200 pts

Attracts because the neutral object Rearranges its charges

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Electrostatics 200 pts

A conductor can obtain a temporary charge by?

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Electrostatics 300 pts

Polarization

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Electrostatics 300 pts

Back

What is conservation of charge?

Electrostatics 400pts

Charge is never created nor destroyed it is just separated and transferred to another object

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Electrostatics 400 pts Answer

Objects A receives a positive charge by rubbing against object B. What is the charge on object B?

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Electrostatics 500 pts

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Electrostatics 500pts Answer

Negative

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Electric Materials 100pts

Materials that allow the flow of electrons

Conductors

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Electric Materials 100 pts

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Electric Materials200 pts

Electric materials that restrict the flow of electrons.

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Electric Materials200ptsAnswer

insulators

Acetate rubbed with cotton gives acetate what kind of charge?

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Electric Materials 300 pts

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Electric Materials300 pts

Positive

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Vinyl rubbed with wool gives vinyl what Kind of charge?

Electric Materials 400

Negative

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Electric Materials400 ptsAnswer

A charged vinyl strip is brought near but does not touch a conductor, what is the charge at the far end of the conductor?

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Electric Materials500 pts

Negative

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Electric Materials500 ptsAnswer

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Electric Forces100 pts

What happens to the forcebetween two charges that are moved three times as far apart?

Decreases by a factorOf nine

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Electric Forces100 ptsAnswer

Back

What happens to the force between two charged conductors if the charge on both conductors are doubledand the distance between them decreases by a

factor of three ?

Electric Forces200pts

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Increases by 36 X

Electric Forces200ptsAnswer

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Electric Forces300pts

The unit of charge is called?

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Electric Forces300ptsAnswer

Coulomb

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What does the force between two electrons

depend on?

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The product of the electric charges divided by

the

Square of the Distance of the charges

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Three positive charges are separated by equal distances. If the force between The first two charges is 2 N what is the Force and direction on the third charge With respect to the other two charges?

2.5 N to the right

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A positive strip touches the knob of the electroscope and then removed. What happens to the leaves when it is removed?

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They stay positively charged and apart.

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What type of charge is left on a electroscope if it is chargedby induction with a negatively charged object?

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Positive

What type of material is an electroscope made of?

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Conductor

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It must be grounded?

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Back

What must be done to an electroscope to induce a positive charge before removing a negative charge?

What does the electroscope show when the electroscope leaves open?

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The electroscope opens dueTo repulsion?

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What is the unit for electric field?

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N/C

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What two properties must a test chargehave?

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1. Positive2. small

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What direction does the field lines take with respect to positive and negative charges?

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Away from positive chargesToward negative charges

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What is the electric field in a region a 1 uC test charge experiences a 200 NForce?

2 x 10 ^8 N/C

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In a region of charge. What does the electric field depend on?

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E = k Q / D2

Q The charge in the region D The distance from the test chargeTo the charge distribution.

When was the internet developed?

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1960’s

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