An 1300-turn coil of wire that is 2.2 cmcm in diameter is in a magnetic field that drops from 0.14 TT to 0 TT in 9.0 msms . The axis of the coil is parallel to the field. What is the emf of the coil? (in V)

The induced  emf is  

Explanation:

From the question we are told that

     The number of turns is  

    The diameter is  

     The initial magnetic field is  

      The final magnetic field is  

      The  time taken is  

The radius is mathematically evaluated as

substituting values

The induced emf is mathematically represented as

Where   is the change in magnetic field which is mathematically represented as

=>  

Here   given that the axis of the coil is parallel to the field

Also A is the cross-sectional area which is mathematically represented as

substituting values

So

So  

answer would be letter choice (a),   a ball resting on a shelf. would be another example of potential energy   >   stored energy > not moving.

a ball spinning on a finger   >   kinetic energy > moving energy

a ball rolling on the ground   >   kinetic energy   > moving energy

a   ball flying through the air   > kinetic energy   >   moving energy

hope that                                         : )

c. magnitude and direction