Explain the phenomenon of electromagnetic induction. Describe an experiment to show that a current is set up in a closed loop when an external magneic field passing through the loop increases or decreases.

A current l flows through a closed loop as shown in figure .The magnetic field at the centre O is

Assertion A conducting loop is rotated in a uniform magnetic field with constant angular velocity omega as shown in figure. At time t = 0, plane of the loop is perpendicular to the magnetic field. Induced emf produced in the loop is maximum when plane of loop is parallel to magnetic field. Reason When plane of loop is parallel to magnetic field, then magnetic flux passing through the loop is zero.

Draw a neat labelled diagram to show the experimental aarangement used to study the magnetic field produced by a current through a loop of conducting wire.