JEE Main · 2022 · 28 Jul 2022 · Shift 2 · Electromagnetic Induction

XPQY is a vertical smooth long loop having a total resistance R where PX is parallel to QY and separation between them is $l$. A constant magnetic field B perpendicular to the plane of the loop exists in the entire space. A rod CD of length L ($L>l$) and mass $m$ is made to sli …

Three identical coils ${\mathrm{C}}_1,{\mathrm{C}}_2$ and ${\mathrm{C}}_3$ are closely placed such that they share a common axis. ${\mathrm{C}}_2$ is exactly midway. ${\mathrm{C}}_1$ carries current $I$ in anti-clockwise direction while ${\mathrm{C}}_3$ carries curre …

Inductance of a coil with $10^4$ turns is 10 mH and it is connected to a dc source of 10 V with internal resistance of $10\Omega$. The energy density in the inductor when the current reaches $\left(\frac{1}{\mathrm{e}}\right)$ of its maximum value is …

Figure shows the circuit that contains three resistances ($9\Omega$ each) and two inductors (4 mH each). The reading of ammeter at the moment switch $K$ is turned ON, is ______ A.

A conducting circular loop is rotated about its diameter at a constant angular speed of $100\mathrm{rad}/\mathrm{s}$ in a magnetic field of 0.5 T perpendicular to the axis of rotation. When the loop is rotated by $30^{\circ }$ from the horizontal position, the induced EMF is 15 …

A capacitor C is first charged fully with potential difference of ${\mathrm{V}}_0$ and disconnected from the battery. The charged capacitor is connected across an inductor having inductance L . In t s $25\%$ of the initial energy in the capacitor is transferred to the induct …