Study Guide – CP Physics – Electricity
1.
Name:_______________________
Explain what current is in our own words. What units would you have for current? (there are a couple
of different ways to describe it)
2. Draw an electric diagram of two lights in parallel and one capacitor and resistor in series. The circuit is
powered by a 6 volt battery with an ammeter in the entire circuit and it has a switch.
3. Explain what resistance is in your own words? What units are used.
4.
If resistance is increased, how does this impact current for the same voltage? Is power consumption
increased or decreased?
5.
Why are short circuits hazardous?
6.
A light uses 5 amps of current for 5 minutes. How many coulombs has the light used?
7.
Explain what voltage is in your own words? What units would you use?
8.
Two stationary charges are 1 meter apart. One is positive 2 coulombs, the other is negative 1 coulomb.
If a mobile negative charge is put halfway in between them, which way will the mobile negative charge
move? What would happen if the stationary positive 2 coulomb charge was replaced with a negative 2
coulomb charge?
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9.
Which will have more resistance, a 22 gauge wire of 10 feet or a 14 gauge wire of 10 feet?
10. A circuit has 10 Ω of resistance and has 120 volts. How many amps are running through the circuit?
11. How much power would the circuit in number 10 require?
12. A series combination of two resistor is 4 Ω and 8Ω are connected to a 12 volt battery. Calculate the
equivalent resistance in the circuit and the current. What is the potential difference across each resistor?
13. A 4 Ω resistor and a 8 Ω resistor are connected to a 12 volt battery. Calculate the equivalent resistance
in the circuit. What is the current in each circuit?
14. You have the following complex circuit (I will draw it on the board). Find the equivalent resistance,
the current and voltage as indicated.
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15. True or false, circuits in parallel have the same voltage?
16. True or false, circuits in series have the same voltage?
17. True or false, circuits in parallel have the same current?
18. One charge is 1 coulombs the other is -4 coulombs. Draw the electric field lines.
19. What is the difference between electric field and electric force?
20. Review your labs from this section. Be able to explain what you observed in the various labs.
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