Electricity
2 Minute Drill
ELECTRICITY is…
What does electric current
flow through?
Electric Circuit
EQ: What is an electric circuit? (p. 317)ANSWER:An electric circuit is a complete, closed path through which electric charges flow.
EQ: What are the 3 essential parts of a circuit?ANSWER:
Energy SourceDefinition:
Examples (3):
LoadDefinition:
Examples (3):
EQ: What factors affect the amount of electric current through a circuit?
Voltage (p. 307)Definition:
More info:
Resistance (p. 308-309)Definition:
More info:
A
D
C B
Challenge: How would the other bulbs be affected if bulb one of the bulbs burned out?
1. If bulb A burned out…
2. If bulb B burned out…
3. If bulb C burned out…
4. If bulb D burned out…
EQ: What happens when there is too much electric current moving through a circuit? (p. 320-321)
• Too much current can cause wires to heat up, melt, and start fires.
• Fuse – when the current gets too high, a strip of metal melts and breaks the circuit.
• Circuit breaker – A switch that opens if the current is too high. A strip of metal heats up and bends, opening the circuit.
Circuit breaker – A switch that opens if the current is too high. A strip of metal heats up and bends, opening the circuit.
– What happens to the charge of an object that loses electrons?
– What happens to the charge of an object that gains electrons?
– What happens to the charge of an object that gains protons?
– An atom has 26 protons and 23 electrons. What is its overall charge?
– Another atom has 47 protons and 52 electrons. What is its overall charge?
– Will these atoms attract or repel each other?
– If you rub a metal rod with a piece of silk, the rod becomes negatively charged. This means that the silk must be…
– What is the difference between static and current electricity?
Suppose you have four bulbs in a series circuit. If you were to add five more bulbs in series with these four, what would happen to the brightness of the bulbs?
Suppose you have four bulbs in a parallel circuit. If you were to add five more bulbs in parallel with these four, what would happen to the brightness of the bulbs?
1. Why are loads necessary in a circuit? 2. What happens when there are too many
loads in a parallel circuit?