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Physics

Find the potential difference required to flow a current of 200 mA in a wire of resistance 20 Ω.

Current Electricity

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Answer

Given,

Current (I) = 200 mA = 0.2 A

Resistance (R) = 20 Ω

Potential difference (V) = ?

From Ohm's law

V = IR

Substituting the values in the formula above, we get,

V = 0.2 × 20

V = 4 V

Hence, the required potential difference = 4 V

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