EASY
12th West Bengal Board
IMPORTANT
Earn 100

If the self-inductance of an air core inductor increases from 0.01 mH to 10 mH on introducing an iron core into it, what is the relative permeability of the core used?

Important Questions on Electromagnetic Induction

MEDIUM
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 9 - Electromagnetic Induction>EXERCISE 9>Q 31
State Fleming's right-hand rule.
HARD
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 9 - Electromagnetic Induction>EXERCISE 9>Q 32
Why a battery loses some extra energy if there is coil of high inductance in a circuit?
HARD
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 9 - Electromagnetic Induction>EXERCISE 9>Q 33
When does self-inductance of a coil act in aD.C. circuit?
HARD
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 9 - Electromagnetic Induction>EXERCISE 9>Q 34
Why self-induction always happens in an ac circuit?
EASY
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 9 - Electromagnetic Induction>EXERCISE 9>Q 35
Compare the roles of resistance and inductance in a circuit?
EASY
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 9 - Electromagnetic Induction>EXERCISE 9>Q 36

A cylindrical bar magnet is kept along the axis of a circular coil. Will there be a current induced if the magnet is rotated about its own axis? Answer giving reason.

EASY
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 9 - Electromagnetic Induction>EXERCISE 9>Q 37
When an aeroplane flies horizontally a potential difference is developed between the tips of the wing. Explain why? On what factor it depends?
EASY
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 9 - Electromagnetic Induction>EXERCISE 9>Q 38
What do you mean by non-inductive coil?