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Ohm's Law
Twelve volts are applied across a resistor. A current of 3 mA is measured. What is the value of the resistor?
4.4
4 k
400
4
4.4
4 k
400
4
Answer
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Related Question
Ohm's Law
A 120 V lamp-dimming circuit is controlled by a rheostat and protected from excessive current by a 3 A fuse. To what minimum resistance value can the rheostat be set without blowing the fuse? Assume a lamp resistance of 20 ohms.
20
4
2
40
20
4
2
40
Answer
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Ohm's Law
How much resistance is required to limit the current from a 12 V battery to 3.6 mA?
22 k
33 k
2.2 k
3.3 k
22 k
33 k
2.2 k
3.3 k
Answer
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Ohm's Law
What is the approximate resistance of a rheostat if the voltage source is 18 V and the current is 220 mA?
82
8.2
820
8.2 k
82
8.2
820
8.2 k
Answer
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Ohm's Law
What is the approximate resistance setting of a rheostat in which 650 mA of current flows with a 150 V source?
9.7
23
97
230
9.7
23
97
230
Answer
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Ohm's Law
If you wish to increase the amount of current in a resistor from 120 mA to 160 mA by changing the 24 V source, what should the new voltage setting be?
3.2 V
8 V
320 V
32 V
3.2 V
8 V
320 V
32 V
Answer
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