LCR Series Circuit and Resonance NEET Questions

Physics - Electromagnetic Induction and Alternating Currents

LCR Series Circuit and Resonance MCQ Questions


7.
The bandwidth of a resonance circuit is given by:
A.
Δω = R/L
B.
Δω = ω₀/Q
C.
Δω = R/2L
D.
Δω = 2R/L
😑 View Answer Rough Work Error
ANSWER :
B. Δω = ω₀/Q
8.
The sharpness of resonance in an LCR circuit is measured by:
A.
Bandwidth
B.
Q-factor
C.
Inductive reactance
D.
Resistance
😑 View Answer Rough Work Error
ANSWER :
B. Q-factor
9.
The quality factor (Q-factor) of a resonant circuit is given by:
A.
ωL/R
B.
1/R√(L/C)
C.
R/ωL
D.
L/R
😑 View Answer Rough Work Error
ANSWER :
B. 1/R√(L/C)
10.
The power factor of a resonant LCR circuit is:
A.
1
B.
Zero
C.
Depends on L
D.
Depends on C
😑 View Answer Rough Work Error
ANSWER :
A. 1
11.
If resistance increases in an LCR circuit, the resonance curve:
A.
No change
B.
Becomes narrower
C.
Remains the same
D.
Becomes wider
😑 View Answer Rough Work Error
ANSWER :
D. Becomes wider
12.
At resonance, the voltage across the inductor and capacitor:
A.
Are equal but lag the current
B.
Are equal and in phase
C.
Are equal and lead the current
D.
Are equal and opposite
😑 View Answer Rough Work Error
ANSWER :
D. Are equal and opposite