EASY
12th CBSE
IMPORTANT
Earn 100

An average induced emf of 0.4 V appears in a coil when the current in it is changed from 10 A in one direction to 10 A in opposite in 0.40 second. Find the coefficient of self-induction of the coil.

Important Questions on Electromagnetic Induction

EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 6 - Electromagnetic Induction>Problems For Practice>Q 7
A coil has a self-inductance of 10 mH. What is the maximum magnitude of the induced emf in the inductor, when a current I=0.1 sin 200 t ampere is sent through it.
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 6 - Electromagnetic Induction>Problems For Practice>Q 8
What is the self-inductance of a solenoid of length 40 cm, area of cross-section 20 cm2 and total number of turns 800?
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 6 - Electromagnetic Induction>Problems For Practice>Q 9
The current in a solenoid of 240 turns, having a length of 12 cm and a radius of 2 cm, changes at the rate of 0.8 As−1. Find the emf induced in it.
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 6 - Electromagnetic Induction>Problems For Practice>Q 10
Calculate the mutual inductance between two coils when a current of 2 A changes to 6 A in 2 s and induces an emf of 20 mV in the secondary coil.
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 6 - Electromagnetic Induction>Problems For Practice>Q 11
The mutual inductance between two coils is 2.5 H. If the current in one coil is changed at the rate 2.0 As−1, what will be the emf induced in the other coil?
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 6 - Electromagnetic Induction>Problems For Practice>Q 12
In a car spark coil, an emf of 40,000 V is induced in the secondary when the primary current changes from 4 A to zero in 10 μs. Find the mutual inductance between the primary and secondary windings of this spark coil.
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 6 - Electromagnetic Induction>Problems For Practice>Q 13
If the current in the primary circuit of a pair of coils changes from 10 A to 0 in 0.1 s, calculate the induced emf in the secondary if the mutual inductance between the two coils is 2 H.
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 6 - Electromagnetic Induction>Problems For Practice>Q 13
If the current in the primary circuit of a pair of coils changes from 10 A to 0 in 0.1 s, calculate the change of flux per turn in the secondary if it has 500 turns.