NEET2015Physics-Power in Ac circuits
NEET 2015 Physics AC Circuits MCQ Question
Type: MCQ-numerical-Medium-Class 12
A resistance R draws power P when connected to an AC source. If an inductance is now placed in series with the resistance, such that the impedance of the circuit becomes Z, the power drawn will be
A
rac{P R^2}{Z^2}
B
rac{P R}{Z}
C
rac{P Z}{R}
D
P
Correct Answer
Option D
Detailed Explanation
The power in an AC circuit is given by . With impedance Z, the current is reduced, and the power becomes rac{P R^2}{Z^2}.
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