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A battery is connected by a copper wire with a resistor that has a resistance of...

A battery is connected by a copper wire with a resistor that has a resistance of 100 ohm. What voltage is required by the battery to produce 180mW of power? (4.2V)

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Answer #1

Answer :-

Resistance (R) = 100 ohm

Power(P) = 180 mW

= 0.180 W

We know that,

P = V2/R

0.180 = V2/100

V2 = 18

V = 4.2 V

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