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Ohm's Law
How much current is produced by a voltage of 18 kV across a 15 k resistance?
12 mA
1.2 A
12 A
120 mA
12 mA
1.2 A
12 A
120 mA
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.
2
4
40
20
2
4
40
20
Answer
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Ohm's Law
An electric heater draws 3.5 A from a 110 V source. The resistance of the heating element is approximately
38.5
3.1
385
31
38.5
3.1
385
31
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?
230
9.7
97
23
230
9.7
97
23
Answer
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Ohm's Law
How much resistance is needed to draw 17.6 mA from a 12 volt source?
68
680
212
6.8 k
68
680
212
6.8 k
Answer
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Ohm's Law
Four amperes of current are measured through a 24 resistor connected across a voltage source. How much voltage does the source produce?
96 V
9.6 V
960 V
8 V
96 V
9.6 V
960 V
8 V
Answer
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