A 30-turn coil has a diameter of 11 cm. The coil is placed in a spatially uniform magnetic field of magnitude 0.30 T so that the face of the coil and the magnetic field are perpendicular. Find the magnitude of the emf induced in the coil (in V) if the magnetic field is reduced to zero uniformly in the following times. (a) 0.70 s

The magnitude of induced emf is 0.122 V

Explanation:

Given:

Number of turns

Magnetic field T

Radius of coil m

Change in time sec

For finding the magnitude of induced emf,

According to the faraday's law,

Where magnetic flux

Where area of coil

For finding magnitude we neglect minus sign,

    V

Therefore, the magnitude of induced emf is 0.122 V

scientific laws are the result of testing theories and proving them to be facts.

the higher the current the higher the mag field around it the higher the influence on the compass