Download Electricity Test Practice Problems

Student Resource Sheet EEM - 18
ELECTRICITY
PRACTICE PROBLEMS
Selected Response (2 points each)
Write the letter of the best answer on the line provided or on the scantron sheet.
_____ 1. Identify the correct unit for current.
a. watts
b. amperes
c. volts
d. ohms
_____ 2. What subatomic particle has the least mass?
a. proton
b. neutron
c. electron
d. voltron
_____ 3. What fights the flow of electric current in a circuit?
a. resistance
b. voltage
c. current
d. static
_____ 4. What is the total resistance of a series circuit composed of three 4 Ω bulbs?
a. 0.25 Ω
b. 1.33 Ω
c. 4 Ω
d. 12 Ω
_____ 5. Find the overall resistance of a circuit powered by a 12 volt battery with a current of 3 amps?
a. 4 Ω
b. 36 Ω
c. 12 Ω
d. 0.25 Ω
_____ 6. A parallel circuit has 3 branches, each with a resistance of 6 Ω. What is the total resistance?
a. 0.5 Ω
b. 2 Ω
c. 6 Ω
d. 18 Ω
_____ 7. All negative charges of an atom are located
a. in the nucleus.
b. in the protons.
c. outside of the nucleus.
d. in the neutrons
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Student Resource Sheet EEM - 18
_____ 8. The particles of an atom that have charges are
a. the proton and neutron.
b. the electron and the neutron.
c. the electron and proton.
d. the proton, neutron, and electron.
_____ 9. The Law of Electrostatics states
a. two objects with like charges will be attracted to each other.
b. two objects with like charges will be repelled from each other.
c. two objects with unlike charges will be repelled from each other.
d. two objects will always be attracted to each other because of gravity.
_____ 10. Electrostatic induction occurs
a. when a charged object contacts a neutral object.
b. when two objects are rubbed together.
c. when a neutral object is brought into the electric field of a charged object.
d. when a magnetic field is created around a circuit.
______ 11. A neutral object can be statically charged by which of the following processes?
a. water
b. friction
c. air
d. all of the above
_____ 12. Which of the following statements best describes the purpose for electrical circuits?
a. Electrical circuits transform electrical energy to light.
b. Electrical circuits transfer chemical energy.
c. Electrical circuits transfer electrical energy.
d. Electrical circuits transform electrical energy with no heat loss.
_____ 13. Which of the following is/are example(s) of a resistor in an electrical circuit?
a. wire
b. light bulb
c. buzzer
d. all of the above
_____ 14. What is an electric field?
a. the area around the nucleus in which the electrons move
b. the area around a magnet that is affected by its magnetism
c. the flow of electrons through a circuit
d. the area around an object that is affected by its electric charge
_____ 15. In a circuit, when the resistance increases,
a. the current increases.
b. the current decreases.
c. the current remains constant.
d. the voltage increases .
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Student Resource Sheet EEM - 18
Use Figure 1 for Questions 16 and 17.
Figure 1
A
1
3
2
_____ 16. The illustration in Figure 1 shows
a. a parallel circuit.
b. a simple circuit.
c. a vertical circuit.
d. a series circuit.
_____ 17. If
a.
b.
c.
d.
bulb 2 burns out, what would happen in the circuit?
The other two bulbs will get brighter.
The circuit will not change.
The other two bulbs will go off.
A short circuit will be created.
Use Figure 2 for Question 18 and 19.
Figure 2
1
2
_____ 18. If a new bulb is added to the circuit shown in Figure 2 in the same manner
a. the resistance in the circuit will increase.
b. the resistance in the circuit will decrease.
c. the resistance in the circuit will not change.
d. the circuit will short out.
_____ 19. Identify the circuit shown in Figure 2.
a. series circuit
b. parallel circuit
c. short circuit
d. simple circuit
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Student Resource Sheet EEM - 18
_____ 20. Which type of electrical circuitry would be best for wiring most of a home?
a. series circuits
b. parallel circuits
c. simple circuits
d. all of the above
_____ 21. Which of the statements below gives an advantage of parallel circuits over series circuits?
a. Appliances are always either all on or all off.
b. As appliances are added the total resistance increases.
c. They are easier to construct.
d. As appliances are added, the total resistance decreases.
_____ 22. Identify the true statement below.
a. Neutral objects are repelled by charged objects.
b. Neutral objects are attracted by charged objects.
c. Neutral objects are not affected by charged objects.
d. Neutral objects are repelled by other neutral objects.
_____ 23. In an electrochemical cell the energy transformation that occurs is
a. potential chemical to kinetic light.
b. potential chemical to kinetic electrical.
c. kinetic chemical to potential light.
d. kinetic chemical to potential electrical.
Use Figure 3 below to answer question 24
Figure 3
_____ 24. In the diagram above, how many pathways are there for the electrons to flow?
a. 1
b. 2
c. 3
d. 4
_____ 25. What type of cell contains liquid chemicals?
a. dry cell
b. skin cell
c. jail cell
d. wet cell
Extra Credit: If the voltage in a circuit is quadrupled and the resistance is tripled, how is current
affected? Show your work on a separate sheet of paper.
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