Question

With the help of a diagram, briefly explain the construction and working of ac generator.

Assertion (A) : Nuclear fission reactions are responsible for energy generation in the Sun. Reason (R) : Light nuclei fuse together in the nuclear fission reactions.

With the help of a labelled diagram, explain the working of an ac generator. Obtain the expression for the emf induced at an instant 't'.

A long, straight horizontal wire X'X is held stationary and carries a current of 3.0 A. A square loop MNPS of side 10 cm, carrying a current of 1.0 A is kept near the wire X'X as shown in the figure. Find the magnitude and direction of the net magnetic force acting on the loop due to the wire.