A transformer is intended to decrease the value of the alternating current from 500 amperes to 25 amperes. The primary coil contains 200 turns. Find the necessary number of turns N2 in the secondary coil.

The number of turns in secondary coil is 4000

Explanation:

Given:

Current in primary coil A

Current in secondary coil A

Number of turns in primary coil

In case of transformer the relation between current and number of turns is given by,

For finding number of turns in secondary coil,

Therefore, the number of turns in secondary coil is 4000

c) up is the direction the magnetic force is acting on the charge.

when two balls of the different masses are dropped from equal height, they reach the ground at the same time .this is because they experience the same acceleration.

the acceleration is independent of mass.

thus when they are dropped they will always maintain the same velocity and travel the same distance (neglect air resistance of course) at the same time.