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Ohm's Law

Ohm's Law
How much resistance is required to limit the current from a 12 V battery to 3.6 mA?

2.2 k
3.3 k
33 k
22 k

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Ohm's Law
How much resistance is needed to draw 17.6 mA from a 12 volt source?

68
6.8 k
212
680

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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.

4
20
40
2

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Ohm's Law
How much voltage is needed to produce 2.5 A of current through a 200 resistor?

500 V
50 V
8 V
80 V

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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?

960 V
96 V
9.6 V
8 V

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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?

590 mA
27.2 mA
5.9 mA
59 mA

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