a) State and explain Lenz's law. b) A bar magnet falls through a metal ring, will its acceleration be equal to g ? Justify your answer. c) According…
Class 12 Physics · 2083 · Solved Question with Answer
a) State and explain Lenz's law.
b) A bar magnet falls through a metal ring, will its acceleration be equal to g? Justify your answer.
c) According to Faraday's law of electromagnetic induction, induced \( \text{emf} = -N\frac{d\phi}{dt} \) What does the negative sign indicate?
OR
a) Define rms value of current.
b) The emf in an ac circuit is represented as \( E = E_0 \sin \omega t \). Show that voltage through an inductor leads current by \( \frac{\pi}{2} \). Also draw a phasor diagram.
c) Why does a capacitor block d.c.?