STANDARDPhysics-Alternating Current
STANDARD Physics Power in AC Circuits MCQ Question
Type: MCQ-conceptual-Medium-Class 12
Power dissipated in an LCR series circuit connected to an ac source of emf ε is
A
ε²/R² + (ωL - 1/ωC)²
B
ε²/R² + (ωL - 1/ωC)²
C
ε²R/√(R² + (ωL - 1/ωC)²)
D
ε²R/√(R² + (ωL - 1/ωC)²)
Correct Answer
Option D
Detailed Explanation
The power dissipated in an LCR circuit is given by P = ε²R/√(R² + (ωL - 1/ωC)²). This formula accounts for the impedance of the circuit.
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