Engineering Board Exam Reviewer · Series Circuits · medium

In the series circuit shown, V=60 V, R1=19, , and R2=5, . How much power is dissipated by R1?

  1. 118.75 W
  2. 189.47 W
  3. 150 W
  4. 237.5 W

Answer

A. 118.75 W

Solution

I=V/RT= 60 V24, =2.5 A. Power in R1: P=I2R1=(2.5 A)2(19, )=118.75 W.

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