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Textbook Expert
Textbook ExpertVerified Tutor
19 Nov 2021

Given information

It is given that:

The Number  of turns in the coil    

The required  diameter of the coil    

The coil is placed between 2 poles of electromagnet

Induced is    

 

 

 

 

 

Step-by-step explanation

Step 1.

The coil is placed between the poles of electromagnet , hence the change in magnetic field of  the electromagnet  changes the flux linked with the coil and hence induces an emf in the coil as per Faraday's Law of electromagnetic induction.

The induced emf in the coil is connected to the change in magnetic flux and the no of turns of the coil by the formula:

  ( we are concerned only about the magnitude of the induced emf)

 

The magnetic flux is defined as  the number of magnetic field lines passing through a given closed surface.

It provides the measurement of the total magnetic field that passes through a given surface area

Mathematically :

, where represents the area of the coil

 

Hence rate of change of magnetic flux is 

 

  

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