The maximum power dissipated by a 100Ω resistor in a circuit is 4W. Calculate the voltage across the resistor.

by | May 22 | Physics WAEC | 0 comments

A. 10V
B. 20V
C. 25V
D. 400V

Correct Answer: Option B

B. 20V

Explanation

V²=PR=V=√4×100

= 20V

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