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Remember Ohm's Law ; V = IR

That is volts = amps(current) X Resistance.

Algebraically rearrange

R = V/I

V = 20 volts

I = 200 mA = 200/1000 Amps = 0.2 amps.

Hence

R = 20 V / 0.2 Amps

R = 100 Ohms

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lenpollock

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1y ago

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