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The total power drawn from the cell in the circuit above is

Physics
JAMB 1989

The total power drawn from the cell in the circuit above is

  • A. 12W
  • B. 24W
  • C. 32W
  • D. 40W
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Correct Answer: Option B
Explanation

Total resistance = resistance in series + resistance in parallel

                         = 4 + (\(\frac{4 \times 4}{4 + 4}\)) = 6\(\Omega\)

Total power drawn = \(\frac{V^2}{\text{R}}\) = \(\frac{12^2}{6}\) = 24W


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