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In the diagram above, X and Y have resistances 6 and 4 ohms respectively, if...

Physics
JAMB 1984

In the diagram above, X and Y have resistances 6 and 4 ohms respectively, if the power dissipation in X is 10W then power dissipation in Y is

  • A. 2.4W
  • B. 4
  • C. 6.0W
  • D. 6.7W
  • E. 15.0W
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Correct Answer: Option D
Explanation

P = \(\frac{ V^2}{R}\)

\(P_1 R_1 = P_2 R_2\) ( Parallel circuit)

 10 x 4 = \(P_2\) x 6

\(P_2\) = \(\frac{40}{6}\) = 6.7W.

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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
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