The power rating of a 400 Ω resistor is 0.25 W. What is the maximum voltage?
A) 10 V
B) 20 V
C) 30 V
D) 40 V
E) 50 V

Name: The power rating of a 400 Ω resistor is 0.25 W. What is the maximum voltage? A) 10 V B) 20 V C) 30 V D) 40 V E) 50 V
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Question

Quizplus · Accepted Answer

The maximum voltage can be calculated using the formula P = V^2 / R. Rearranging gives V = sqrt(P * R). Substituting the given values, V = sqrt(0.25 W * 400 Ω) = 10 V.

The Power Rating of a 400 Ω Resistor Is 0