JEE Main PYQs on Alternating Current (AC) Circuits: JEE Main Questions for Practice with Solutions

Educational Content Expert | Updated on - Aug 26, 2025

The JEE Main Physics section requires speed and accuracy, along with a thorough understanding of the Alternating Current (AC) Circuits. This article provides a set of JEE Main PYQs on AC Circuits to help you understand the topic and improve your problem-solving skills with the help of detailed solutions by ensuring conceptual clarity, which will help you in the JEE Main 2026 preparation.

Whether you're revising the basics or testing your knowledge, these JEE Main PYQs will serve as a valuable practice resource.

The JEE Main 2026 exam is likely to continue on the same pattern as JEE Main 2025. Out of 90 questions, students can expect a fair mix from all three subjects. To get an edge, going through JEE Main previous year questions (PYQs) is one of the best strategies.

JEE Main PYQs on Alternating Current (A.C) Circuits

1. An electric bulb rated as 100 W-220 V is connected to an ac source of rms voltage 220 V. The peak value of current through the bulb is :

A0.64 A

B0.45 A

C2.2 A

D0.32 A

View Solution

2. An alternating current is represented by the equation, i = 100√2 sin(100πt) ampere. The RMS value of current and the frequency of the given alternating current are:

A100√2 A, 100 Hz

B100 A, 100 Hz

C100 A, 50 Hz

D50√2 A, 50 Hz

View Solution

3. An AC current is represented as: i = 5√2 + 10 cos (650πt + π/6) Amp. The RMS value of the current is:

A50 Amp

B100 Amp

C10 Amp

D5√2 Amp

View Solution

4. A series LCR circuit is connected to an alternating source of emf E. The current amplitude at resonance frequency is I₀. If the value of resistance R becomes twice of its initial value, then amplitude of current at resonance will be:

A I₀/2

B 2I₀

C I₀

D I₀/√2

View Solution

View More JEE Main Questions

SHARE ON FACEBOOK SHARE ON TWITTER

JEE Main Questions

1.
A coil of negligible resistance is connected in series with \(90 \, \Omega\) resistor across \(120 \, \text{V}, \, 60 \, \text{Hz}\) supply. A voltmeter reads \(36 \, \text{V}\) across resistance. Inductance of the coil is:
- \(0.76 \, \text{H}\)
- \(2.86 \, \text{H}\)
- \(0.286 \, \text{H}\)
- \(0.91 \, \text{H}\)
View Solution
2.
A series LCR circuit is connected to an alternating source of emf \( E \). The current amplitude at resonance frequency is \( I_0 \). If the value of resistance \( R \) becomes twice of its initial value, then amplitude of current at resonance will be:
- \( \frac{I_0}{2} \)
- \( 2I_0 \)
- \( I_0 \)
- \( \frac{I_0}{\sqrt{2}} \)
View Solution
3.
An alternating voltage \( V(t) = 220 \sin 100 \pi t \) volt is applied to a purely resistive load of 50 \( \Omega \). The time taken for the current to rise from half of the peak value to the peak value is:
- 5 ms
- 3.3 ms
- 7.2 ms
- 2.2 ms
View Solution
4.
In an ac circuit, the instantaneous current is zero,when the instantaneous voltage is maximum. In this case, the source may be connected to :
A. pure inductor.
B. pure capacitor.
C. pure resistor.
D. combination of an inductor and capacitor.
Choose the correct answer from the options given below :
- A, B and C only
- B, C and D only
- A and B only
- A, B and D only
View Solution
5.
A bulb and a capacitor are connected in series across an ac supply. A dielectric is then placed between the plates of the capacitor. The glow of the bulb:
- increases
- remains same
- becomes zero
- decreases
View Solution
6.
An alternating voltage of amplitude 40 V and frequency 4 kHz is applied directly across the capacitor of 12 μF. The maximum displacement current between the plates of the capacitor is nearly:
- 13 A
- 8 A
- 10 A
- 12 A
View Solution

View All

Fees Structure

Structure based on different categories

Categories	State
General	1000
Women	800
sc	500
pwd	500
Others	900

Note: The application fee for choosing exam centers in India and countries other than India varies.

In case of any inaccuracy, Notify Us!

Comments

No Comments To Show

JEE Main PYQs on AC Circuits: JEE Main Questions for Practice with Solutions

JEE Main PYQs on Alternating Current (A.C) Circuits

JEE Main Questions

1.
A coil of negligible resistance is connected in series with \(90 \, \Omega\) resistor across \(120 \, \text{V}, \, 60 \, \text{Hz}\) supply. A voltmeter reads \(36 \, \text{V}\) across resistance. Inductance of the coil is:

2.
A series LCR circuit is connected to an alternating source of emf \( E \). The current amplitude at resonance frequency is \( I_0 \). If the value of resistance \( R \) becomes twice of its initial value, then amplitude of current at resonance will be:

3.
An alternating voltage \( V(t) = 220 \sin 100 \pi t \) volt is applied to a purely resistive load of 50 \( \Omega \). The time taken for the current to rise from half of the peak value to the peak value is:

5.
A bulb and a capacitor are connected in series across an ac supply. A dielectric is then placed between the plates of the capacitor. The glow of the bulb:

6.
An alternating voltage of amplitude 40 V and frequency 4 kHz is applied directly across the capacitor of 12 μF. The maximum displacement current between the plates of the capacitor is nearly:

Fees Structure

Structure based on different categories

Comments

SUBSCRIBE TO OUR NEWS LETTER

JEE Main PYQs on Alternating Current (A.C) Circuits

JEE Main Questions

1.A coil of negligible resistance is connected in series with \(90 \, \Omega\) resistor across \(120 \, \text{V}, \, 60 \, \text{Hz}\) supply. A voltmeter reads \(36 \, \text{V}\) across resistance. Inductance of the coil is:

2.A series LCR circuit is connected to an alternating source of emf \( E \). The current amplitude at resonance frequency is \( I_0 \). If the value of resistance \( R \) becomes twice of its initial value, then amplitude of current at resonance will be:

3.An alternating voltage \( V(t) = 220 \sin 100 \pi t \) volt is applied to a purely resistive load of 50 \( \Omega \). The time taken for the current to rise from half of the peak value to the peak value is:

4.In an ac circuit, the instantaneous current is zero,when the instantaneous voltage is maximum. In this case, the source may be connected to :A. pure inductor.B. pure capacitor.C. pure resistor.D. combination of an inductor and capacitor.Choose the correct answer from the options given below :

5.A bulb and a capacitor are connected in series across an ac supply. A dielectric is then placed between the plates of the capacitor. The glow of the bulb:

6.An alternating voltage of amplitude 40 V and frequency 4 kHz is applied directly across the capacitor of 12 μF. The maximum displacement current between the plates of the capacitor is nearly:

Fees Structure

Structure based on different categories

Comments

SUBSCRIBE TO OUR NEWS LETTER

1.
A coil of negligible resistance is connected in series with \(90 \, \Omega\) resistor across \(120 \, \text{V}, \, 60 \, \text{Hz}\) supply. A voltmeter reads \(36 \, \text{V}\) across resistance. Inductance of the coil is:

2.
A series LCR circuit is connected to an alternating source of emf \( E \). The current amplitude at resonance frequency is \( I_0 \). If the value of resistance \( R \) becomes twice of its initial value, then amplitude of current at resonance will be:

3.
An alternating voltage \( V(t) = 220 \sin 100 \pi t \) volt is applied to a purely resistive load of 50 \( \Omega \). The time taken for the current to rise from half of the peak value to the peak value is:

5.
A bulb and a capacitor are connected in series across an ac supply. A dielectric is then placed between the plates of the capacitor. The glow of the bulb:

6.
An alternating voltage of amplitude 40 V and frequency 4 kHz is applied directly across the capacitor of 12 μF. The maximum displacement current between the plates of the capacitor is nearly: