Question

A rectangular frame of wire is placed in a uniform magnetic field directed outwards ,normal to the paper AB is connected to the spring which is stretched to A'toB'and then released @ time t =0 ,explain quatitatively how induced emf of the coil vary with time

Answer 1

Given :

A rectangular frame of wire is placed in a uniform magnetic field directed outwards ,normal to the paper AB which is connected to spring .

Explanation :

When the spring is stretched and released the wire AB will execute SHM[ simple harmonic motion ].

So induced emf will vary periodically.

we will get the following equation

v=A ω  sin⁡ωt -----------(1)

E=Bvl

on substituting the value of v from equation 1

E=BAωl  sin⁡ωt (where A= BB’ = AA’)

Answer 2

Explanation:

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