Question

If in any circuit, power dissipation at 10v is 5w. Then the resistance r of the circuit is ??

Answer 1

Voltage = 10v
Current = 5w
Resistance = V/I = 10/5 = 2 ohms
therefore answer is 2 ohms

Answer 2

Given :

Power dissipated , P = 5 W .

Potential applied , V = 10 V .

To Find :

The resistance R of the circuit .

Solution :

We know , power is given by :

$P=\dfrac{V^2}{R}\\\\R=\dfrac{V^2}{P}\\\\R=\dfrac{10^2}{5}\\\\R=20\ ohms$

Therefore , The resistance of the circuit is 20 ohms .

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Resistance

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