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Ohm's Law

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
400
4 k
4

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Ohm's Law
The formula to find I when the values of V and R are known is

I = V/R
I = R/V
I = VR
V = IR

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Ohm's Law
Approximately how much current flows through a 3.3 M resistor across a 30 V source?

9000 A
900 A
9 A
90 A

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

14.4 V
10 V
100 V
1.4 V

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Ohm's Law
What is the approximate filament resistance of a light bulb if it operates from a 110 V source and 0.6 A of current is flowing?

18.3
6.6
66
183

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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?

8.2 k
820
8.2
82

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