(i) How will you show that Lenz's law is a conclusion of energy conservation law? Explain with suitable examples.
(ii) Using the expression for Lorentz force applied on charge carriers of any conductor, obtain an expression for that induced emf which is induced in a conductor of length $l$ moving with a velocity $v$, perpendicular to any magnetic field $B$.
With the help of a labelled diagram, explain how does an AC works. There are $N$ turns in coil of AC generator. Area of each turn is A and the coil is rotating with a uniform angular velocity. Establish an expression for generated induced electromotive force. What is the source of energy production by this method?
What do you understand by self-induction?Obtain an expression for self-induction of a solenoid.###Define self-induction. Obtain an expression for self-induction of a solenoid of N turns, length $l$ and area of cross-section A.
Define induction coefficient. Explain the phenomenon of mutual inductance with the help of an experiment. Obtain an expression for mutual inductance coefficient of two solenoids and prove that $M=\sqrt{L_1 L_2}$.