EASY
12th West Bengal Board
IMPORTANT
Earn 100

Predict the polarity of the capacitor in the situation described in the figure given below.

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Important Questions on Electromagnetic Induction

EASY
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 9 - Electromagnetic Induction>EXERCISE 9>Q 15
Magnetic flux through a coil changes from 12 mWb to 6 mWb in 0.015 s. What is the induced emf in volts?
EASY
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 9 - Electromagnetic Induction>EXERCISE 9>Q 16
Why is the oscillation of copper disc in a magnetic field are damped?
EASY
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 9 - Electromagnetic Induction>EXERCISE 9>Q 17
The two ends of coil of resistance R are joined by a connecting wire. The magnetic flux linked by the coil changes by ∆ϕ. How much charge would flow in the circuit?
EASY
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 9 - Electromagnetic Induction>EXERCISE 9>Q 18
Which factors self-inductance of a coil depends upon?
EASY
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 9 - Electromagnetic Induction>EXERCISE 9>Q 19
Write three factors on which mutual inductance between a pair of coils depends.
EASY
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 9 - Electromagnetic Induction>EXERCISE 9>Q 20
What is the unit of mutual inductance?
EASY
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 9 - Electromagnetic Induction>EXERCISE 9>Q 21

The electric current in a wire in the direction from B to A is decreasing. What is the direction of induced current in the metallic loop kept above the wire?

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EASY
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 9 - Electromagnetic Induction>EXERCISE 9>Q 22
A metallic wire 1 m in length is moving normally across a magnetic field of 0.1 T with a speed of 5 m s-1. What is emf (in volts) between ends of the wire?