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Ohm's Law

Ohm's Law
When there is 12 mA of current through a 1.2 k resistor, the voltage across the resistor is

1.4 V
14.4 V
100 V
10 V

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Ohm's Law
A resistor is connected across a 50 V source. What is the current in the resistor if the color code is red, orange, orange, silver?

2 mA
21.4 mA
214 mA
2.2 mA

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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
97
23
9.7

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Ohm's Law
Approximately how many milliamperes of current flow through a circuit with a 40 V source and 6.8 k of resistance?

27.2 mA
5.9 mA
59 mA
590 mA

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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?

400
4
4 k
4.4

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Ohm's Law
You are measuring the current in a circuit that is operated on an 18 V battery. The ammeter reads 40 mA. Later you notice the current has dropped to 20 mA. How much has the voltage changed?

9 V
18 V
900 mV
0 V

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