Current Electricity · JEE Main previous year questions

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2026 40 questions

Q452026 · 8 Apr 2026 · Shift 2
1. A.
2. B.
3. C.
4. D.
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Answer: B
Q392026 · 6 Apr 2026 · Shift 1
1. A.6
2. B.2
3. C.4
4. D.5
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Answer: B
Q432026 · 6 Apr 2026 · Shift 1
1. A.4/3
2. B.3/4
3. C.5/3
4. D.3/5
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Answer: A
Q462026 · 6 Apr 2026 · Shift 1· Numerical answer
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Answer: 3477
Q432026 · 6 Apr 2026 · Shift 2
1. A. $1, 0 respectively$
2. B. $0, 1 respectively$
3. C. $0, 0 respectively$
4. D. $1, 1 respectively$
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Answer: C
Q482026 · 6 Apr 2026 · Shift 2· Numerical answer
A moving coil of galvanometer when shunted with $2 Ω$ resistance gives a full scale deflection for a current of $500 mA$ . When a resistance of $470 Ω$ is connected in series it gives a full scale deflection for $10 V$ potential applied on it. The value of resistance of galvanometer coil is ________ $Ω$ .
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Answer: 50
Q492026 · 6 Apr 2026 · Shift 2· Numerical answer
Two cells of emfs $1 V$ and $2 V$ and internal resistance $2 Ω$ and $1 Ω$ , respectively connected in parallel, gave a current of $1 A$ through an external resistance. If the polarity of one cell is reversed, then value of current through the external resistance will be $\frac{α}{5} A$ . The value of $α$ is ________.
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Answer: 3
Q442026 · 5 Apr 2026 · Shift 1
An a.c. source of angular frequency $ω$ is connected across a resistor $R$ and a capacitor $C$ in series. The current is observed as $I$ . Now the frequency of the source is changed to $ω /4$ , (keeping the voltage unchanged) the current is found to be $I /3$ . The ratio of resistance to reactance at frequency $ω$ is
1. A. $\frac{6}{7}$
2. B. $\frac{3}{5}$
3. C. $\frac{7}{8}$
4. D. $\frac{3}{4}$
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Answer: C
Q452026 · 5 Apr 2026 · Shift 1
1. A. $A = 0$ , $B = 1$ , $C = 1$
2. B. $A = 1$ , $B = 0$ , $C = 0$
3. C. $A = 1$ , $B = 0$ , $C = 1$
4. D. $A = 1$ , $B = 1$ , $C = 0$
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Answer: C
Q472026 · 5 Apr 2026 · Shift 1· Numerical answer
From $18 m$ height above the ground a ball is dropped from rest . The height above the ground at which the magnitude of velocity equal to the magnitude of acceleration (in the same set of units) due to gravity is ____ $m$ . (Take $g = 10 m/ s^{2}$ and neglect the air resistance)
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Answer: 13
Q272026 · 5 Apr 2026 · Shift 2
In an experiment to determine the resistance of a given wire using Ohm's law, the voltmeter and ammeter readings are noted as $10 V$ and $5 A$ , respectively. The least counts of voltmeter and ammeter are $500 mV$ and $200 mA$ , respectively. The estimated error in the resistance measurement is ____ $Ω$
1. A.0.25
2. B.2
3. C.2.5
4. D.0.18
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Answer: D
Q492026 · 5 Apr 2026 · Shift 2· Numerical answer
When an external resistance of $5 Ω$ is connected across terminals of a cell, a current of $0.25 A$ flows through it. When the $5 Ω$ resistor is replaced by a $2 Ω$ resistor, a current of $0.5 A$ flows through it. The internal resistance of the cell is ____ $Ω$ .
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Answer: 1
Q502026 · 5 Apr 2026 · Shift 2· Numerical answer
A circular loop of radius $20 cm$ and resistance $2 Ω$ is placed in a time varying magnetic field $B = (2 t^{2} + 2 t + 3) T$ . At $t = 0$ , for the plane of the loop being perpendicular to the magnetic field and, the induced current in the loop at $t = 3 s$ is $\frac{α}{50} A$ . The value of $α$ is ____. (Take $π = 22/7$ )
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Answer: 44
Q372026 · 4 Apr 2026 · Shift 1
A voltmeter with internal resistance of $x Ω$ can be used to measure upto $20 V$ . In order to increase its measuring range to $30 V$ , the required modification is to ________.
1. A.connect resistor of $\frac{x}{2} Ω$ , in series with voltmeter.
2. B.connect resistor of $\frac{x}{2} Ω$ , in parallel to voltmeter.
3. C.connect a resistor of $x Ω$ in series with voltmeter.
4. D.connect resistor of $2 x Ω$ in parallel to voltmeter.
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Answer: A
Q382026 · 4 Apr 2026 · Shift 1
1. A. $Y = 1101$
2. B. $Y = 0010$
3. C. $Y = 0111$
4. D. $Y = 1000$
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Answer: A
Q422026 · 4 Apr 2026 · Shift 1
1. A.2.2
2. B.2.0
3. C.2.1
4. D.2.4
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Answer: A
Q432026 · 4 Apr 2026 · Shift 1
1. A. $24 V, 12 A$
2. B. $24 V, 4 A$
3. C. $18 V, 12 A$
4. D. $27 V, 4 A$
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Answer: B
Q302026 · 2 Apr 2026 · Shift 2
1. A.OR gate
2. B.AND gate
3. C.NAND gate
4. D.NOR gate
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Answer: D
Q382026 · 2 Apr 2026 · Shift 2
Two resistors of $200 Ω$ and $400 Ω$ are connected in series with a battery of $100 V$ . A bulb rated at $200 V, 100 W$ is connected across the $400 Ω$ resistance. The potential drop across the bulb is ____ $V$ .
1. A.25
2. B.50
3. C.66.6
4. D.100
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Answer: B
Q392026 · 2 Apr 2026 · Shift 2
Two metal plates $(A, B)$ are kept horizontally with separation of $(\frac{12}{π}) cm$ , with plate A on the top. An atomizer jet sprays oil (density $1.5 g/c m^{3}$ ) droplets of radius $1 mm$ horizontally. All oil droplets carry a charge $5 nC$ . The potentials $V_{A}$ and $V_{B}$ are required on plates A and B respectively in order to ensure the droplets do not descend. The values of $V_{A}$ and $V_{B}$ are ____. (Neglect the air resistance to the droplets and take $g = 10 m/ s^{2}$ )
1. A. $100 V$ and $580 V$
2. B. $580 V$ and $100 V$
3. C. $60 V$ and $400 V$
4. D. $0 V$ and $- 200 V$
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Answer: A
Q292026 · 28 Jan 2026 · Shift 1
The electric current in the circuit is given as $i = i_{o} (t / T)$ . The r.m.s current for the period $t = 0$ to $t = T$ is ____ .
1. A. $\frac{i _{o}}{2}$
2. B. $\frac{i _{o}}{3}$
3. C. $i_{o}$
4. D. $\frac{i _{o}}{6}$
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Answer: B
Q392026 · 28 Jan 2026 · Shift 1
For the two cells having same EMF $E$ and internal resistance $r$ , the current passing through the external resistor $6Ω$ is same when both the cells are connected either in parallel or in series. The value of internal resistance $r$ is ____ $Ω$ .
1. A.3
2. B.6
3. C.4
4. D.9
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Answer: B
Q432026 · 28 Jan 2026 · Shift 1
In the potentiometer, when the cell in the secondary circuit is shunted with $4 Ω$ resistance, the balance is obtained at the length $120 cm$ of wire. Now when the same cell is shunted with $12 Ω$ resistance, the balance is shifted to a length of $180 cm$ . The internal resistance of cell is ____ $Ω$
1. A.4
2. B.12
3. C.6
4. D.3
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Answer: A
Q482026 · 28 Jan 2026 · Shift 1· Numerical answer
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Answer: 21
Q452026 · 28 Jan 2026 · Shift 2
1. A.1.05
2. B.0.95
3. C.0
4. D.2
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Answer: B