Question

Question 2 (10%)

An electromagnet of flux equal to 5Wb increases uniformly to 20Wb in a period of 2s Calculate the
Voltage induced in a coil having(6 turys and is stationary in the magnetic field.
(10%)

Answer 1

45 V

Step-by-step explanation:

Electromagnetic induction occurs when there an electromotive force is induced in a coil due to a change in magnetic flux through the coil.

Mathematically, the induced voltage is given by Faraday-Newmann-Lenz law:

`\epsilon = - (N\Delta \Phi)/(\Delta t)`

where

N is the number of turns in the coil

`\Delta \Phi` is the change in magnetic flux

`\Delta t` is the time elapsed

In this problem,

N = 6 is the number of turns in the coil

The change in magnetic flux is:

`\Delta \Phi = 20 Wb - 5 Wb = 15 Wb`

`\Delta t = 2 s` is the time elapsed

Substituting, we find the induced voltage:

`\epsilon = - ((6)(15))/(2)=-45 V`

And the negative sign only indicates the direction.