A 1300-turn coil of wire that is 2.2 cm in diameter is in a magnetic field that drops from 0.11 T to 0 {\rm T} in 12 ms. The axis of the coil is parallel to the field What is the emf of the coil?

The induced voltage 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

Generally the induced emf  is mathematically represented as

Where   is the change in magnetic flux of the wire which is mathematically represented as

=>  

Here  

since the axis of the coil is parallel to the field

    Where A  is the cross-sectional area of the coil which is mathematically represented as

So the induced emf

          Here we substituted the values of