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Calculate the rate at which energy is used up in the circuit illustrated by the...

Physics
WAEC 1992

Calculate the rate at which energy is used up in the circuit illustrated by the diagram

  • A. 0 W
  • B. 2 W
  • C. 4 W
  • D. 8 W
  • E. 16 W
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Correct Answer: Option C
Explanation

\(R = \frac{R_1 X R_2}{R_1 + R_2}\)

= 1


\(E = I^2R = 2^2 x 1 =4W\)

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