10 JEE Main 2026 Alternating Current previous-year questions with verified answers and step-by-step solutions.
These are the JEE Main 2026 previous-year questions from the Alternating Current chapter of Physics. Each links to a full solution with a verified answer key. To see the whole chapter across all years, visit the Alternating Current chapter hub.
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 22…
A capacitor C is first charged fully with potential difference of V₀ and disconnected from the battery. The charged cap…
Using a variable frequency a.c. voltage source the maximum current measured in the given LCR circuit is 50 mA for V=5 (…
The figure given below shows an LCR series circuit with two switches S₁ and S₂. When switch S₁ is closed keeping S₂ ope…
An inductor stores 16 J of magnetic field energy and dissipates 32 W of thermal energy due to its resistance when an a.…
A LCR series circuit driven with Erms = 90 V at frequency fd = 30 Hz has resistance R = 80 Ω, an inductance with induct…
A series LCR circuit with R = 20 Ω, L = 1.6 H and C = 40 is connected to a variable frequency a.c. source. The inductiv…
The electric current in the circuit is given as i=io(t / T). The r.m.s current for the period t=0 to t=T is \\\\_.
An a.c. source of angular frequency ω is connected across a resistor R and a capacitor C in series. The current is obse…
For the series L C R circuit connected with 220 ~V, 50 ~Hz a.c source as shown in the figure, the power factor is (α)/(…