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WAEC - Physics (2003 - No. 35)

The maximum power dissipated by a 100\(\Omega\) resistor in a circuit is 4W. Calculate the voltage across the resistor
10V
20V
25V
400V

Vysvětlení

\(V^2 = PR = V = \sqrt{4} \times 100\)

= 20V

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