| 91. |
| A constant voltage is used with a
variety of resistors and the current is measured. Which of the
following graphs is correct?
Answer
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| 92. |
| The current is measured as the voltage
is changed for a resistor. Which of the following graphs is
correct?
Answer |
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| 93. |
What is the
resistance of a 1.50 x 103 watt toaster connected to a 115 volt
circuit? Answer
|
|
A. |
0.0767 ohms |
C. |
8.82 ohms |
|
B. |
0.277 ohms |
D. |
13.0 ohms |
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| 94. |
What is the power
rating of a light bulb that uses 1.25 amps when connected to a 115 volt
circuit? Answer
|
|
A. |
9.58 watts |
C. |
92.0 watts |
|
B. |
12.0 watts |
D. |
144 watts |
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| 95. |
The circuits in your
house are Answer
|
|
A. |
parallel so each appliance has the same
current. |
|
B. |
parallel so each appliance has the same
voltage. |
|
C. |
series so each appliance has the same
current. |
|
D. |
series so each
appliance has the same voltage. |
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| 96. |
A galvanometer can
be converted into an ammeter by Answer
|
|
A. |
connecting a low resistance in series |
|
B. |
connecting a high resistance in series |
|
C. |
connecting a low resistance in parallel |
|
D. |
connecting a high
resistance in parallel |
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| 97. |
A split-ring
commutator is used to Answer
|
|
A. |
decrease the voltage in a transformer |
|
B. |
keep the torque acting in the same
direction for a DC motor |
|
C. |
keep the torque acting the same direction
for an AC motor |
|
D. |
increase the voltage
in a transformer |
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| 98. |
Which of the
following can be used to decrease the resistance in a wire? Answer
|
|
A. |
substitute iron for copper |
C. |
increase the temperature of the
wire |
|
B. |
increase the length of the wire |
D. |
increase the diameter of the
wire |
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| 99. |
A 40.0 ohm resistor
has 50.0 coulombs passing through in 10.0 seconds. What is the
voltage drop across the resistor? Answer
|
|
A. |
8.00 volts |
C. |
141 volts |
|
B. |
12.5 volts |
D. |
200. volts |
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| 100. |
The torque of a DC
motor can be increased by Answer
|
|
A. |
increasing the number of coils of wire in
the armature |
|
B. |
decreasing the potential difference |
|
C. |
increasing distance between armature and
field poles |
|
D. |
decreasing the
strength of the field poles |
