. How would you demonstrate that a momentary current can be obtained by the suitable use of a magnet, a coil of wire and a galvanometer


(a) How would you demonstrate that a momentary current can be obtained by the suitable use of a magnet, a coil of wire and a galvanometer?

(b) What is the source of energy associated with the current obtained in part (a)?

Best Answer

relative motion

(a) When there is a relative motion between the coil and magnet, magnetic flux linked with the coil changes. The magnetic flux through the coil increases if the coil is moved towards the north pole of magnet. Due to change in the magnetic flux linked with the coil, an e.m.f. is induced in the coil. The induced e.m.f. causes a current to flow in the coil if the circuit of coil is closed.

(b) Mechanical energy is the source of energy associated with the current obtained in part (a)

 

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