Current Electricity: JEE Mains Previous Year Questions (2021-2024) | Physics for JEE Main & Advanced PDF Download

 Page 1


JEE Main Previous Year Questions 
(2021-24): Current Electricity 
2024 
Q1 - 2024 (01 Feb Shift 1) 
The reading in the ideal voltmeter (V) shown in the given circuit diagram is: 
 
(1) 5 V 
(2) 10 V 
(3) 0 V 
(4) 3 V 
Q2 - 2024 (01 Feb Shift 1) 
A galvanometer has a resistance of 50O and it allows maximum current of 5 mA. It can 
be converted into voltmeter to measure upto 100 V by connecting in series a resistor of 
resistance 
 
Page 2


JEE Main Previous Year Questions 
(2021-24): Current Electricity 
2024 
Q1 - 2024 (01 Feb Shift 1) 
The reading in the ideal voltmeter (V) shown in the given circuit diagram is: 
 
(1) 5 V 
(2) 10 V 
(3) 0 V 
(4) 3 V 
Q2 - 2024 (01 Feb Shift 1) 
A galvanometer has a resistance of 50O and it allows maximum current of 5 mA. It can 
be converted into voltmeter to measure upto 100 V by connecting in series a resistor of 
resistance 
 
(1) 5975O 
(2) 20050O 
(3) 19950O 
(4) 19500O 
Q3 - 2024 (01 Feb Shift 1) 
The current in a conductor is expressed as ?? = 3?? 2
+ 4?? 3
, where ?? is in Ampere and ?? is 
in second. The amount of electric charge that flows through a section of the conductor 
during ?? = 1 s to t = 2 s is C. 
Q4 - 2024 (01 Feb Shift 1) 
In an ammeter, 5% of the main current passes through the galvanometer. If resistance 
of the galvanometer is G, the resistance of ammeter will be : 
[We changed options. In official NTA paper no option was correct.] 
(1) 
?? 20
 
(2) 
?? 199
 
(3) 199G 
(4) 200G 
Q5 - 2024 (01 Feb Shift 2) 
To measure the temperature coefficient of resistivity ?? of a semiconductor, an electrical 
arrangement shown in the figure is prepared. The arm BC is made up of the 
semiconductor. The experiment is being conducted at 25
°
C and resistance of the 
semiconductor arm is 3 mO. Arm BC is cooled at a constant rate of 2
°
C/s. If the 
galvanometer G shows no deflection after 10 s, then ?? is : 
Page 3


JEE Main Previous Year Questions 
(2021-24): Current Electricity 
2024 
Q1 - 2024 (01 Feb Shift 1) 
The reading in the ideal voltmeter (V) shown in the given circuit diagram is: 
 
(1) 5 V 
(2) 10 V 
(3) 0 V 
(4) 3 V 
Q2 - 2024 (01 Feb Shift 1) 
A galvanometer has a resistance of 50O and it allows maximum current of 5 mA. It can 
be converted into voltmeter to measure upto 100 V by connecting in series a resistor of 
resistance 
 
(1) 5975O 
(2) 20050O 
(3) 19950O 
(4) 19500O 
Q3 - 2024 (01 Feb Shift 1) 
The current in a conductor is expressed as ?? = 3?? 2
+ 4?? 3
, where ?? is in Ampere and ?? is 
in second. The amount of electric charge that flows through a section of the conductor 
during ?? = 1 s to t = 2 s is C. 
Q4 - 2024 (01 Feb Shift 1) 
In an ammeter, 5% of the main current passes through the galvanometer. If resistance 
of the galvanometer is G, the resistance of ammeter will be : 
[We changed options. In official NTA paper no option was correct.] 
(1) 
?? 20
 
(2) 
?? 199
 
(3) 199G 
(4) 200G 
Q5 - 2024 (01 Feb Shift 2) 
To measure the temperature coefficient of resistivity ?? of a semiconductor, an electrical 
arrangement shown in the figure is prepared. The arm BC is made up of the 
semiconductor. The experiment is being conducted at 25
°
C and resistance of the 
semiconductor arm is 3 mO. Arm BC is cooled at a constant rate of 2
°
C/s. If the 
galvanometer G shows no deflection after 10 s, then ?? is : 
 
 
(1) -2 × 10
-2°
C
-1
 
(2) -1.5 × 10
-2°
C
-1
 
(3) -1 × 10
-20
C
-1
 
(4) -2.5 × 10
-2°
C
-1
 
Q6 - 2024 (01 Feb Shift 2) 
In a metre-bridge when a resistance in the left gap is 2O and unknown resistance in the 
right gap, the balance length is found to be 40 cm. On shunting the unknown resistance 
with 2O, the balance length changes by : 
(1) 22.5 cm 
(2) 20 cm 
(3) 62.5 cm 
(4) 65 cm 
Q7 - 2024 (27 Jan Shift 1) 
A wire of length 10 cm and radius v7 × 10
-4
 m connected across the right gap of a 
meter bridge. When a resistance of 4.5O is connected on the left gap by using a 
Page 4


JEE Main Previous Year Questions 
(2021-24): Current Electricity 
2024 
Q1 - 2024 (01 Feb Shift 1) 
The reading in the ideal voltmeter (V) shown in the given circuit diagram is: 
 
(1) 5 V 
(2) 10 V 
(3) 0 V 
(4) 3 V 
Q2 - 2024 (01 Feb Shift 1) 
A galvanometer has a resistance of 50O and it allows maximum current of 5 mA. It can 
be converted into voltmeter to measure upto 100 V by connecting in series a resistor of 
resistance 
 
(1) 5975O 
(2) 20050O 
(3) 19950O 
(4) 19500O 
Q3 - 2024 (01 Feb Shift 1) 
The current in a conductor is expressed as ?? = 3?? 2
+ 4?? 3
, where ?? is in Ampere and ?? is 
in second. The amount of electric charge that flows through a section of the conductor 
during ?? = 1 s to t = 2 s is C. 
Q4 - 2024 (01 Feb Shift 1) 
In an ammeter, 5% of the main current passes through the galvanometer. If resistance 
of the galvanometer is G, the resistance of ammeter will be : 
[We changed options. In official NTA paper no option was correct.] 
(1) 
?? 20
 
(2) 
?? 199
 
(3) 199G 
(4) 200G 
Q5 - 2024 (01 Feb Shift 2) 
To measure the temperature coefficient of resistivity ?? of a semiconductor, an electrical 
arrangement shown in the figure is prepared. The arm BC is made up of the 
semiconductor. The experiment is being conducted at 25
°
C and resistance of the 
semiconductor arm is 3 mO. Arm BC is cooled at a constant rate of 2
°
C/s. If the 
galvanometer G shows no deflection after 10 s, then ?? is : 
 
 
(1) -2 × 10
-2°
C
-1
 
(2) -1.5 × 10
-2°
C
-1
 
(3) -1 × 10
-20
C
-1
 
(4) -2.5 × 10
-2°
C
-1
 
Q6 - 2024 (01 Feb Shift 2) 
In a metre-bridge when a resistance in the left gap is 2O and unknown resistance in the 
right gap, the balance length is found to be 40 cm. On shunting the unknown resistance 
with 2O, the balance length changes by : 
(1) 22.5 cm 
(2) 20 cm 
(3) 62.5 cm 
(4) 65 cm 
Q7 - 2024 (27 Jan Shift 1) 
A wire of length 10 cm and radius v7 × 10
-4
 m connected across the right gap of a 
meter bridge. When a resistance of 4.5O is connected on the left gap by using a 
resistance box, the balance length is found to be at 60 cm from the left end. If the 
resistivity of the wire is R × 10
-7
Om, then value of R is : 
(1) 63 
(2) 70 
(3) 66 
(4) 35 
Q8 - 2024 (27 Jan Shift 1) 
A wire of resistance ?? and length ?? is cut into 5 equal parts. If these parts are joined 
parallely, then resultant resistance will be : 
(1) 
1
25
R 
(2) 
1
5
?? 
(3) 25R 
(4) 5R 
Q9 - 2024 (27 Jan Shift 2) 
Wheatstone bridge principle is used to measure the specific resistance (S
1
) of given 
wire, having length ?? , radius ?? . If ?? is the resistance of wire, then specific resistance is : 
?? 1
= ?? (
?? ?? 2
?? ). If the length of the wire gets doubled then the value of specific resistance 
will be : 
(1) 
?? 1
4
 
(2) 2 S
1
 
(3) 
?? 1
2
 
(4) ?? 1
 
Q10 - 2024 (27 Jan Shift 2) 
Page 5


JEE Main Previous Year Questions 
(2021-24): Current Electricity 
2024 
Q1 - 2024 (01 Feb Shift 1) 
The reading in the ideal voltmeter (V) shown in the given circuit diagram is: 
 
(1) 5 V 
(2) 10 V 
(3) 0 V 
(4) 3 V 
Q2 - 2024 (01 Feb Shift 1) 
A galvanometer has a resistance of 50O and it allows maximum current of 5 mA. It can 
be converted into voltmeter to measure upto 100 V by connecting in series a resistor of 
resistance 
 
(1) 5975O 
(2) 20050O 
(3) 19950O 
(4) 19500O 
Q3 - 2024 (01 Feb Shift 1) 
The current in a conductor is expressed as ?? = 3?? 2
+ 4?? 3
, where ?? is in Ampere and ?? is 
in second. The amount of electric charge that flows through a section of the conductor 
during ?? = 1 s to t = 2 s is C. 
Q4 - 2024 (01 Feb Shift 1) 
In an ammeter, 5% of the main current passes through the galvanometer. If resistance 
of the galvanometer is G, the resistance of ammeter will be : 
[We changed options. In official NTA paper no option was correct.] 
(1) 
?? 20
 
(2) 
?? 199
 
(3) 199G 
(4) 200G 
Q5 - 2024 (01 Feb Shift 2) 
To measure the temperature coefficient of resistivity ?? of a semiconductor, an electrical 
arrangement shown in the figure is prepared. The arm BC is made up of the 
semiconductor. The experiment is being conducted at 25
°
C and resistance of the 
semiconductor arm is 3 mO. Arm BC is cooled at a constant rate of 2
°
C/s. If the 
galvanometer G shows no deflection after 10 s, then ?? is : 
 
 
(1) -2 × 10
-2°
C
-1
 
(2) -1.5 × 10
-2°
C
-1
 
(3) -1 × 10
-20
C
-1
 
(4) -2.5 × 10
-2°
C
-1
 
Q6 - 2024 (01 Feb Shift 2) 
In a metre-bridge when a resistance in the left gap is 2O and unknown resistance in the 
right gap, the balance length is found to be 40 cm. On shunting the unknown resistance 
with 2O, the balance length changes by : 
(1) 22.5 cm 
(2) 20 cm 
(3) 62.5 cm 
(4) 65 cm 
Q7 - 2024 (27 Jan Shift 1) 
A wire of length 10 cm and radius v7 × 10
-4
 m connected across the right gap of a 
meter bridge. When a resistance of 4.5O is connected on the left gap by using a 
resistance box, the balance length is found to be at 60 cm from the left end. If the 
resistivity of the wire is R × 10
-7
Om, then value of R is : 
(1) 63 
(2) 70 
(3) 66 
(4) 35 
Q8 - 2024 (27 Jan Shift 1) 
A wire of resistance ?? and length ?? is cut into 5 equal parts. If these parts are joined 
parallely, then resultant resistance will be : 
(1) 
1
25
R 
(2) 
1
5
?? 
(3) 25R 
(4) 5R 
Q9 - 2024 (27 Jan Shift 2) 
Wheatstone bridge principle is used to measure the specific resistance (S
1
) of given 
wire, having length ?? , radius ?? . If ?? is the resistance of wire, then specific resistance is : 
?? 1
= ?? (
?? ?? 2
?? ). If the length of the wire gets doubled then the value of specific resistance 
will be : 
(1) 
?? 1
4
 
(2) 2 S
1
 
(3) 
?? 1
2
 
(4) ?? 1
 
Q10 - 2024 (27 Jan Shift 2) 
A current of 200?? A deflects the coil of a moving coil galvanometer through 60
°
. The 
current to cause deflection through 
?? 10
 radian is : 
(1) 30?? A 
(2) 120?? A 
(3) 60?? A 
(4) 180?? A 
Q11 - 2024 (27 Jan Shift 2) 
Three voltmeters, all having different internal resistances are joined as shown in figure. 
When some potential difference is applied across A and ?? , their readings are ?? 1
, ?? 2
 and 
?? 3
. Choose the correct option. 
 
(1) ?? 1
= ?? 2
 
(2) ?? 1
? ?? 3
- ?? 2
 
(3) ?? 1
+ ?? 2
> ?? 3
 
(4) ?? 1
+ ?? 2
= ?? 3
 
Q12 - 2024 (29 Jan Shift 1)