When you walk through a metal detector carrying a metal object in your pocket, it raises an alarm. This phenomenon works on :

An AC voltage $V=20 \sin 200 \pi t$ is applied to a series LCR circuit which drives a current $I=10 \sin \left(200 \pi…

A resonance circuit having inductance and resistance 2 $\times$ 10$-$4 H and 6.28$\Omega$ respectively oscillates at 10 MHz frequency. The…

A transformer operating at primary voltage $8 \,\mathrm{kV}$ and secondary voltage $160 \mathrm{~V}$ serves a load of $80 \mathrm{~kW}$.…

AC voltage V(t) = 20 sin$\omega$t of frequency 50 Hz is applied to a parallel plate capacitor. The separation between the plates is 2 mm…

A alternating current at any instant is given by $i=[6+\sqrt{56} \sin (100 \pi t+\pi / 3)]$ A. The $r m s$ value of the current is ______ A.