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Retake review for Test-: GLE 9.2.1, 9.2.2 & 9.2.3- Electricity (Chapter 7)
9.2.1- Electric Charge
1. Which of the three subatomic particles are able to be removed from an atom, and flows as the current in a
circuit? _______________
2. Static electricity is the ____________________ of excess ______________ ____________ on an object.
3. How do charges interact with one another? (draw in arrows to show the force)

Like charges _____________
ex.
+
+

Opposite charges ___________
ex.
-
-
4. A conductor of electricity is a material which is _______________ at allowing ______________ to flow.
5. An insulator of electricity is a material which is _______ ______________ at allowing
________________ to flow.
9.2.2- Electric Current
6. Electric current is a measure of the amount of _________________ flowing in a circuit.
The symbol for current is:
R,
I or
V
Current is measured in: _________
7. The voltage difference in a circuit is a measure of the ________________ per _____________ of
electricity flowing in a circuit.
The symbol for voltage difference is:
R,
I or
V
Voltage difference is measured in: _________
8. The Resistance in a circuit is a measure of how much the flow of ________________ in a circuit is
_____________.
The symbol for resistance is:
R,
I or
V
Resistance is measured in: _________
9. How do each of the following characteristics impact a material’s resistance?

Temperature-

Length-

Thickness (diameter)-
10. Ohm’s law states that as the _________________in a circuit _______________ the current will decrease.
11. What is the voltage difference in a circuit with a resistance of 30 ohms, if the current in the circuit is .5
A?
12. What is the resistance of a light bulb if it is plugged into a 9 V circuit with a .2 A current?
13. What is the current in a circuit if there is 120 V and 300 ohms of resistance?
9.2.3- Electrical Energy
14. Draw a series circuit:
15. What is the disadvantage of a series circuit?
16. Draw a parallel circuit:
17. Which of the two types of circuits are found in most household wiring?______________
18. The purpose of a fuse or a circuit breaker is to ________________ an _________________ circuit to
prevent ________________________.