by DeepWebLabs
JEE-MAIN SERIES
Physics

Ac Circuits

10 previous year questions.

Volume: 10 Ques
Yield: Medium

High-Yield Trend

5
2026
5
2025

Chapter Questions
10 MCQs

01
PYQ 2025
medium
physics ID: jee-main
A series LCR circuit is connected to an alternating source of emf . The current amplitude at resonance frequency is . If the value of resistance becomes twice of its initial value, then amplitude of current at resonance will be:
1

2

3

4

02
PYQ 2025
hard
physics ID: jee-main

For the AC circuit shown in the figure, and , and the phase difference between and is 90°. The input signal frequency is rad/sec, where is:

03
PYQ 2025
easy
physics ID: jee-main
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 :
1
0.64 A
2
0.45 A
3
2.2 A
4
0.32 A
04
PYQ 2025
easy
physics ID: jee-main
An AC current is represented as: The RMS value of the current is:
1
50 Amp
2
100 Amp
3
10 Amp
4
Amp
05
PYQ 2025
medium
physics ID: jee-main

An alternating current is represented by the equation, ampere. The RMS value of current and the frequency of the given alternating current are

1
2
3
4
06
PYQ 2026
medium
physics ID: jee-main
An inductor of 10 mH, capacitor of 0.1 µF and a resistor of 100 Ω are connected in series across an a.c power supply 220 V, 70 Hz. The power factor of the given circuit is 0.5. The difference in the inductive reactance and capacitance reactance is Ω. The value of is ______.
07
PYQ 2026
medium
physics ID: jee-main

A series LCR circuit with is connected to a variable frequency a.c. source. The inductive reactance at resonant frequency is _____ .

08
PYQ 2026
medium
physics ID: jee-main
The figure given below shows an LCR series circuit with two switches and . When switch is closed keeping open, the phase difference between the current and source voltage is 30° and phase difference is 60° when is closed keeping open. The value of is _______ H.}
1

2

3

4
3
09
PYQ 2026
medium
physics ID: jee-main
An a.c. source of angular frequency is connected across a resistor and a capacitor in series. The current is observed as . Now the frequency of the source is changed to , (keeping the voltage unchanged) the current is found to be . The ratio of resistance to reactance at frequency is:
1
2
3
4

10
PYQ 2026
medium
physics ID: jee-main
In the given circuit, energy stored in the inductor is and power dissipated in resistance is . Find the value of .
1
2
3
4

About Ac Circuits - JEE-MAIN

Ac Circuits is a vital chapter for JEE-MAIN aspirants. Mastering the concepts covered in this chapter is essential for securing a top rank.

By rigorously practicing the previous year questions associated with this chapter, you can identify high-yield topics, understand the examiner's perspective, and boost your confidence during the actual exam.

Frequently Asked Questions

Why focus on Ac Circuits PYQs?

Analyzing PYQs for this specific chapter reveals the most frequently tested concepts and the typical complexity of questions, allowing you to tailor your study plan efficiently.

How to best use this analysis?

Review the topic breakdown to see which sub-topics within Ac Circuits carry the most weight. Then, tackle the questions iteratively to solidify your understanding.