Question

A coil having 500 sq. loops of side 10 cm is placed normal to magnetic flux which increases at a rate of 1 T/s. The induced emf is

Answer 1

Answer:

ε= -d(φ)/dt

  = -d(NAB)/dt

  = -NAdB/dt

  = -500*{10*10^(-2)}²*1

   =  -5V

   

Answer 2

Faraday's Principle of Electromagnetic Induction states that the emf induced in a loop due by a changing magnetic flux is equal to the rate of change of the magnetic flux threading the loop. The magnetic flux threading a coil of wire can be changed by moving a bar magnet in and out of the coil.