EASY
12th West Bengal Board
IMPORTANT
Earn 100

What is copper loss in a transformer?

Important Questions on Transient Current and Alternating Current

EASY
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 10 - Transient Current and Alternating Current>EXERCISE 10>Q 71
How are the energy losses reduced in a transformer ?
EASY
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 10 - Transient Current and Alternating Current>EXERCISE 10>Q 72

State the underlying principle of an ac generator. Write the relationship between the peak value and rms value of an alternating voltage.

EASY
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 10 - Transient Current and Alternating Current>EXERCISE 10>Q 73

State the underlying principle of a transformer. Write two causes of power loss in it.

HARD
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 10 - Transient Current and Alternating Current>EXERCISE 10>Q 1
An electric circuit has an inductance L, a resistance R connected in series with a battery of emf ε. Discuss how current grows in the circuit when circuit is switched on. Draw graph to show its variation.
HARD
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 10 - Transient Current and Alternating Current>EXERCISE 10>Q 2
A steady current is flowing in an electric circuit containing an inductance L and resistance R  in series. All of a sudden the battery is removed from the circuit without breaking the circuit. Explain how current decays smoothly.
HARD
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 10 - Transient Current and Alternating Current>EXERCISE 10>Q 3
Establish the equation describing the growth of current in an L-R circuit. What is time constant ?
HARD
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 10 - Transient Current and Alternating Current>EXERCISE 10>Q 4
Establish the equation describing the decay of current in a L-R circuit. Define the time constant for the circuit.
MEDIUM
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 10 - Transient Current and Alternating Current>EXERCISE 10>Q 5
Explain why self-inductance of a d.c. circuit is an undesirable element. What is non-inductive winding of a coil.