Name:    Unit 9E Chapter 13 Quiz

Multiple Choice
Identify the choice that best completes the statement or answers the question.

1.

Which of the following diagrams represents a circuit that contains a two-cell battery, two lamps, and an open switch, connected in series?
 a. b. c. d.

2.

In a circuit diagram, the following symbol would represent a(n)

 a. variable DC power supply b. electric cell c. three-cell battery d. lamp

3.

The circuit represented by the following diagram is a

 a. series circuit b. parallel circuit c. all of the above d. none of the above

4.

Choose the best description of the circuit represented by the following circuit diagram.

 a. A two-cell battery, with four lamps, each with its own closed switch, connected in parallel. b. An electric cell, with four lamps, each with its own open switch, connected in series. c. A two-cell battery, with four electric motors, each with its own closed switch, connected in parallel. d. A two-cell battery, with four lamps, each with its own closed switch, connected in series.

5.

What device is used to measure potential difference?
 a. voltmeter b. ammeter c. ohmmeter d. electroscope

6.

A parallel circuit contains four identical lamps. The current through the energy source is 3.5 A. The total resistance of the circuit is 7.0 W. What are the voltage across each energy source and across each lamp?
 a. energy source: 2 V; lamp: 2 V b. energy source: 2 V; lamp: 24.5 V c. energy source: 24.5 V; lamp: 24.5 V d. energy source: 24.5 V; lamp: 2 V

7.

What must be present for an electrical device to operate?
 a. a flow of protons b. a flow of electrons c. a flow of neutrons d. all of the above

8.

An ammeter is correctly connected to a circuit in which of the following figures?
 a. b. c. all of the above d. none of the above

9.

A series circuit has three identical lamps. The potential difference of the energy source is 10 V. The total resistance of the lamps is 50 W. What is the current through each lamp?
 a. 5.0 A b. 0.2 V c. 0.2 W d. 0.2 A

10.

Which unit is used to measure electrical resistance?
 a. volts b. joules c. ohms d. amperes

11.

Which of the following is an example of a circuit connected in series?
 a. b. c. d.

12.

When calculating the potential difference across a resistor, Ohm’s law would be arranged in which of the following ways?
 a. b. c. V = IR d. none of the above

13.

Which of the following symbols is used to represent a resistor in a circuit diagram?
 a. b. c. d.

14.

Which of the following is an example of a factor that influences the internal resistance of a conductor?
 a. length of the conductor b. cross-sectional area c. temperature d. all of the above

15.

Which of the following is a true statement regarding internal resistance?
 a. Thinner wires have less internal resistance than thicker ones. b. Longer wires have greater internal resistance than shorter wires. c. The ability of a material to conduct electricity is determined by how freely protons can move within the material. d. Internal resistance decreases when temperature increases.

16.

A measure of the difference in electric potential energy per unit of charge between two points is called
 a. voltage b. resistance c. current d. none of the above

17.

The resistance of a load can be calculated by
 a. dividing the voltage across the load by the amount of current flowing through it b. multiplying the voltage across the load by the amount of current flowing through it c. dividing the current flowing through a load by the voltage across it d. adding the voltage across the load to the amount of current flowing through it

18.

A current of 0.5 A is passing through a 1000 W resistor. What is the potential difference across the resistor?
 a. 50 V b. 200 V c. 500 V d. 2000 V

19.

A load has 1.0 A of current flowing through it. The voltage across the load is 5.0 V. What is the resistance of the load?
 a. 0.2 W b. 0.5 W c. 5.0 W d. 5.0 V

20.

A 210 W resistor is connected to a power supply set at 21 V. What is the current going through the resistor?
 a. 0.01 A b. 0.1 A c. 1 A d. 10 A