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Electromagnetism — JEE Physics MCQs

Master Electromagnetism for JEE Main with free physics MCQs. Each question includes a detailed solution and instant feedback — practice at easy, medium, and hard difficulty levels to build exam-ready confidence.

3 practice questions with instant feedback and solutions.

Easy•Electromagnetism

A circular loop of radius

7

cm carries a current of

2

A. Its magnetic moment is:

Hard•Electromagnetism

A series LCR circuit is connected to a

45 \sin (\omega t)

Volt source. The resonant angular frequency of the circuit is

10^{5} \mathrm{rad} \mathrm{s}^{-1}

and current amplitude at resonance is

I_{0}

. When the angular frequency of the source is

\omega=8 \times 10^{4} \mathrm{rad} \mathrm{s}^{-1}

, the current amplitude in the circuit is

0.05 I_{0}

. If

L=50 \mathrm{mH}

, match each entry in List-I with an appropriate value from List-II and choose the correct option.

\textbf{List-I}

(P)

I_{0}

\mathrm{mA}

(Q) The quality factor of the circuit (R) The bandwidth of the circuit in

\mathrm{rad} \mathrm{s}^{-1}

(S) The peak power dissipated at resonance in Watt

\textbf{List-II}

(1) 44.4 (2) 18 (3) 400 (4) 2250 (5) 500

Medium•Electromagnetism

A current carrying wire heats a metal rod. The wire provides a constant power

(P)

to the rod. The metal rod is enclosed in an insulated container. It is observed that the temperature

(T)

in the metal rod changes with time

(t)

T(t)=T_{0}\left(1+\beta t^{\frac{1}{4}}\right)

where

\beta

is a constant with appropriate dimension while

T_{0}

is a constant with dimension of temperature. The heat capacity of the metal is,