BITSAT SERIES Physics
Lcr Circuit
13 previous year questions.
Volume: 13 Ques
Yield: Medium
High-Yield Trend
1
2026 1
2021 1
2020 1
2019 2
2018 1
2016 1
2015 1
2014 1
2011 2
2010 1
2005 Chapter Questions 13 MCQs
01
PYQ 2005
medium
physics ID: bitsat-2
In a circuit L, C and R are connected in series with an alternating voltage source of frequency f .The current leads the voltage by 45 . The value of C is
1
2
3
4
02
PYQ 2010
medium
physics ID: bitsat-2
An alternating voltage V=VāĻ t is applied across a circuit. As a result, a current I=Iā(Ļ t-Ļ/2) flows in it. The power consumed per cycle is
1
zero
2
0.5VāIā
3
0.707VāIā
4
1.414VāIā
03
PYQ 2010
medium
physics ID: bitsat-2
A resistance R and inductance L and a capacitor C are connected in series with an AC supply. The resistance of R is 16Ī©, inductive reactance =24Ī© and capacitive reactance =12Ī©. If the current in the circuit is 5A, find the potential difference across R, L and C.
1
30, 20, 50 volt
2
40, 100, 60 volt
3
70, 110, 60 volt
4
80, 120, 60 volt
04
PYQ 2011
medium
physics ID: bitsat-2
Which one of the following curves represents the variation of impedance Z with frequency f in a series LCR circuit? 
1
A
2
B
3
C
4
D
05
PYQ 2014
medium
physics ID: bitsat-2
Voltage and current in an AC circuit are given by and . The power dissipated in the circuit is:
1
2
3
4
zero
06
PYQ 2015
medium
physics ID: bitsat-2
In the circuit shown below, the AC source has voltage with . The amplitude of the current will be nearest to: 
1
2
3
4
07
PYQ 2016
medium
physics ID: bitsat-2
A resistor of resistance R, capacitor of capacitance C and inductor of inductance L are connected in parallel to an AC power source of voltage . The maximum current through the resistance is half of the maximum current through the power source. Then value of R is:
Answer:
1
2
3
4
None of these
08
PYQ 2018
medium
physics ID: bitsat-2
In the circuit shown, the symbols have their usual meanings. The cell has emf E. X is initially joined to Y for a long time. Then, X is joined to Z. The maximum charge on C at any later time will be: 
1
2
3
4
dfracEā(LC)R
09
PYQ 2018
medium
physics ID: bitsat-2
A resistor and an inductor are connected to an AC supply of 120V and 50Hz. The current in the circuit is 3A. If the power consumed is 108W, then the resistance in the circuit is:
1
2
3
4
360Ī©
10
PYQ 2019
medium
physics ID: bitsat-2
In the circuit shown below, the AC source has voltage V = 20cos(Ļ t)V with Ļ = 2000rad/s. The amplitude of the current will be nearly 
1
2
3
4
ā(5)A
11
PYQ 2020
medium
physics ID: bitsat-2
A resistor of resistance R, capacitor of capacitance C and inductor of inductance L are connected in parallel to an AC power source of voltage varepsilonāsinĻ t. The maximum current through the resistance is half of the maximum current through the power source. Then value of R is:
1
2
3
4
None of these
12
PYQ 2021
medium
physics ID: bitsat-2
A coil of inductance 300mH and resistance 2Ī© is connected to a source of voltage 2V. The current reaches half of its steady state value in
1
0.1s
2
0.05s
3
0.3s
4
0.15s
13
PYQ 2026
medium
physics ID: bitsat-2
A series LCR circuit consists of , , and . The input voltage is V. The amplitude of current in the circuit is
1
25 A
2
50 A
3
75 A
4
100 A