Example 11
If we consider the potential differences from A to B, we can write
Example 12
The self inductance of air-core solenoid is L0 = μ0n2Al = 0.02 mH
The self inductance of iron-core solenoid is L = μn2Al = 10 mH
The relative permeability of iron rod is 
Example 13
The coefficient of self-induction of an air-core solenoid is given by
Example 14
The coefficient of self-induction of an air-core solenoid is given by
Example 15
For long co-axial solenoids, the mutual inductance is given by
Example 16
The mutual inductance of the solenoid and the loop is given by
Example 17
The induced emf in the secondary coil is given by
Example 18
Maximum emf is given by
Example 19
Maximum emf is given by
Example 20
(a) Maximum emf is given by
(b) Maximum current I0 = ε0 / R = 157.1/100 = 1.571 A
(c) We have to find the instantaneous values of emf and the current.
Instantaneous emf is given by
ε = ε0 sin ωt = 157.1 sin (314.2t)
Instantaneous current is given by
I = I0 sin ωt = 1.571 sin (314.2t)
CBSE Electromagnetic Induction ( With Hint / Solution)
Class XII (By Mr. Ashis Kumar Satapathy)
email - [email protected]
Electromagnetic Induction
