An Easy Circuit Problem

Electricity and Magnetism Level 1

How many combined watts of power are dissipated in the resistors in this circuit?


The answer is 66.667.

Steven Chase by Steven Chase , 37, USA

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1 solution

Steven Chase
May 30, 2019

The total equivalent resistance is:

R T = 1 + 1 2 = 3 2 R_T = 1 + \frac{1}{2} = \frac{3}{2}

The power is:

P = V 2 R T = 100 3 / 2 ≈ 66.667 P = \frac{V^2}{R_T} = \frac{100}{3/2} \approx 66.667

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