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If the voltage and current in an A.C. circuit is 90° out of phase, then the power in the circuit will be -
  • a)
    Minimum
  • b)
    Maximum
  • c)
    Zero
  • d)
    90 Watt
Correct answer is option 'C'. Can you explain this answer?
Most Upvoted Answer
If the voltage and current in an A.C. circuit is 90° out of phase,...
The correct answer is 'option C'
Concept:
The power in an AC circuit is given by the expression
ϕP=VIcosϕ........(1)
here, ϕ is the angle between voltage and current.
Solution:
It is given to us that ϕ = 900
From eqn(1)
P = 0 Watts
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If the voltage and current in an A.C. circuit is 90° out of phase, then the power in the circuit will be -a)Minimumb)Maximumc)Zerod)90 WattCorrect answer is option 'C'. Can you explain this answer?
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