Aflat, circular, steel loop of radius 75 cm is at rest in a uniform magnetic field. the field is perpendicular to the plane of the loop. the field is changing with time, according to an exponential function: b(t)=(1.4t) e- (0.057sec-1)t. when is the induced emf equal to 5% of its initial value? 170 msec 245 msec 52.6 msec o 39.5 msec

The time is 52.6 sec.

Explanation:

Given that,

Radius = 75 cm

Magnetic field

We need to calculate the area

Put the value into the formula

We need to calculate the emf

Put the value into the formula

For initial value of emf , t = 0

Now, If the induced emf equal to 5% of its initial value

We need to calculate the emf

Hence, The time is 52.6 sec.

false

explanation: