Multiple Choice
Identify the
letter of the choice that best completes the statement or answers the question.
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1.
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Which
of the following is the best description of a schematic diagram? a. | uses pictures to
represent the parts of a circuit | b. | determines the location of the parts of a
circuit | c. | shows the parts of a circuit and how the parts connect to each
other | d. | shows some of the parts that make up a
circuit | | |
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2.
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What happens when the switch is closed in the circuit
shown above? a. | The lamp lights
because current from the battery flows through the lamp. | b. | Current from the
battery flows through the resistor. | c. | Current from the battery flows through both the lamp and the
resistor. | d. | The lamp goes out, because the battery terminals connect to
each other. | | |
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3.
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A
circuit has a continuous path through which charge can flow from a voltage source to a device that
uses electrical energy. What is the name of this type of circuit? a. | a short
circuit | c. | an open
circuit | b. | a closed circuit | d. | a circuit schematic | | | | |
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4.
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If
the potential difference across a pair of batteries used to power a flashlight is 6.0 V, what is the
potential difference across the flashlight bulb? a. | 3.0 V | c. | 9.0 V | b. | 6.0
V | d. | 12
V | | | | |
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5.
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Which
of the following statements about a battery as a source of electric current is not
true? a. | A battery is a
source of emf. | b. | A battery provides the energy that moves
charge. | c. | The terminal voltage of a battery is equal to its
emf. | d. | The terminal
voltage of a battery is the voltage it delivers to the load. | | |
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6.
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Three
resistors with values of R , R ,
and R are connected in series. Which of the following expresses
the total resistance, R , of the three resistors? a. | Req = R1 + R2 +
R3 | c. | Req = R1 = R2 =
R3 | b. | Req =  | d. | Req =  | | | | |
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7.
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Three
resistors with values of 3.0 W, 6.0 W, and 12 W are connected in series. What is the equivalent resistance of this
combination? a. | 0.58
W | c. | 7.0 W | b. | 1.7 W | d. | 21 W | | | | |
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8.
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Three
resistors connected in parallel have potential differences across them labeled DV , DV , and DV . Which of the following expresses the potential difference across all three
resistors? a. | DVt
= DV1 + DV2 + DV3 | c. | DVt = DV1 = DV2
= DV3 | b. | DVt =  | d. | DVt =  | | | | |
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9.
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Three
resistors with values of R , R , and R are connected in parallel. Which of the following expresses the total resistance,
R , of the three resistors? a. | Req = R1 + R2 +
R3 | c. | Req = R1 = R2 =
R3 | b. | Req =  | d. | Req =  | | | | |
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10.
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Two
resistors having the same resistance value are wired in parallel. How does the equivalent resistance
compare to the resistance value of a single resistor? a. | The equivalent
resistance is twice the value of a single resistor. | b. | The equivalent
resistance is the same as a single resistor. | c. | The equivalent
resistance is half the value of a single resistor. | d. | The equivalent
resistance is greater than that of a single resistor. | | |
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11.
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Three
resistors with values of 4.0 W, 6.0 W, and 10.0 W are connected in parallel. What is their equivalent resistance? a. | 20.0
W | c. | 6.0 W | b. | 7.3 W | d. | 1.9 W | | | | |
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12.
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Three
resistors with values of 3.0 W, 6.0 W, and 12 W are connected in parallel. What is the equivalent resistance of this
combination? a. | 0.26
W | c. | 9.0 W | b. | 1.7 W | d. | 21 W | | | | |
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13.
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To
find the current in a complex circuit, it is necessary to know the a. | potential
difference in each device in the circuit. | b. | current in each device in the
circuit. | c. | equivalent resistance of the circuit. | d. | number of
branches in the circuit. | | |
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14.
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What
is the equivalent resistance of the resistors in the figure shown above? a. | 7.5 W | c. | 16 W | b. | 10 W | d. | 18 W | | | | |
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15.
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Two
resistors with values of 6.0 W and 12 W are connected in parallel. This combination is connected in series with a 4.0
W resistor. What
is the equivalent resistance of this combination? a. | 0.50 W | c. | 8.0 W | b. | 2.0 W | d. | 22 W | | | | |
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16.
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What
is the equivalent resistance for the resistors in the figure shown above? a. | 25 W | c. | 7.5 W | b. | 10.0 W | d. | 5.0 W | | | | |
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17.
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What
is the equivalent resistance for the resistors in the figure shown above? a. | 1.3 W | c. | 3.0 W | b. | 2.2 W | d. | 12.0
W | | | | |
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18.
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Three
resistors connected in parallel have individual values of 4.0 W, 6.0
W, and 10.0
W, as shown
above. If this combination is connected in series with a 12.0 V battery and a 2.0 W resistor, what
is the current in the 10.0 W resistor? a. | 0.58 A | c. | 11 A | b. | 1.0 A | d. | 16 A | | | | |
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19.
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Two
resistors with values of 6.0 W and 12 W are connected in parallel. This combination is connected in series with a 2.0
W resistor and a
24 V battery. What is the current in the 2.0 W resistor? a. | 2.0 A | c. | 6.0 A | b. | 4.0
A | d. | 12
A | | | | |
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20.
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In
any complex resistance circuit, the voltage across any resistor in the circuit is
always a. | less than the
voltage source. | b. | equal to or less than the voltage
source. | c. | equal to the voltage source. | d. | greater than the
voltage source. | | |
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