The maximum power dissipated by a 100(Omega) resistor in a circuit is 4W. Calculate the…

The maximum power dissipated by a 100(Omega) resistor in a circuit is 4W. Calculate the voltage across the resistor
  • A.
    10V
  • B.
    20V
  • C.
    25V
  • D.
    400V
Correct Answer: Option B
Explanation

(V^2 = PR = V = sqrt{4} times 100)
= 20V

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