Name: ___________________
Study Guide for Electricity Quiz
1. If two charges repel each other, the two charges must be
a. positive and positive.
c. negative and negative.
b. Positive and negative.
D. either a or c.
2. Which of the following wires has the lowest resistance?
a. A short, thick copper wire at 25 degrees Celsius.
b. A long, thick copper wire at 35 degrees Celsius.
c. A long, thin copper wire at 35 degrees Celsius.
d. A long, thin iron wire at 25 degrees Celsius.
3. An object becomes charged when the atoms in the object gain or lose
a. protons
b. neutrons
c. electrons
d. All of the above
4. If you rub a glass rod with a piece of silk, the rod becomes positively charged. This means that
a. friction destroyed electrons in the rod.
b. the silk has become negatively charged.
c. protons have moved to the rod.
d. glass attracts more protons.
5. The law of electric charges states that
a. every action has an equal and opposite reaction.
b. Charged objects that move produce electric current.
c. the energy of charges and mass are interchangeable.
d. like charges repel and opposite charges attract.
6. The strength of the electric force depends on the
a. size of the objects
c. the distance between the charges.
b. size of the charges
d. both b and c
7. On a dry day, you can build up charge by shuffling your feet on a carpet. This is an example of
charging by
a. friction
b. conduction
c. induction
d. reduction
8. A material through which charges can move easily is called a(n)
a. conductor
b. insulator
c. inductor
d. redactor
9. A(n) _____________ produces an electric current by converting chemical energy into electrical
energy.
a. electroscope
b. fuse
c. cell
d. circuit
10. Opposition to the flow of electric charge is called
a. voltage
b. current
c. potential difference
d. resistance
11. Resistance is affected by
a. temperature
b. thickness
d. All of the above
c. length
12. The rate at which electrical energy is used to do work is called
a. electric current
b. electric potential
c. electric power
d. static electricity
13. A circuit in which all parts are connected in a single loop is called a(n)
a. open circuit
b. open load
c. series circuit
d. parallel circuit
14. A device that uses electrical energy to do work is called a
a. circuit
b. load
c. series circuit
d. parallel circuit
For the quiz, please study the formulas for Resistance and Electric Power as well as schematics of
electrical circuits.
Answers: 1D, 2A, 3C, 4B, 5D, 6D, 7A, 8A, 9C, 10D, 11D, 12C, 13C, 14B