AIPMT MAINS2009Physics-Alternating Current
AIPMT MAINS 2009 Physics Power in AC Circuits MCQ Question
Type: MCQ-numerical-Hard-Class 12
Power dissipated in an LCR series circuit connected to an a.c source of emf ε is:
A
ε²R / √[R² + (Lω - 1/Cω)²]
B
ε²[R² + (Lω - 1/Cω)²] / R
C
ε²R / [R² + (Lω - 1/Cω)²]
D
ε²R² / [R² + (Lω - 1/Cω)²]
Correct Answer
Option D
Detailed Explanation
The power dissipated in an LCR circuit is given by the formula P = I²R, where I is the current. The impedance of the circuit affects the current, and the correct formula accounts for the impedance in the denominator.
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