HARD
12th West Bengal Board
IMPORTANT
Earn 100

Establish the equation describing the growth of current in an L-R circuit. What is time constant ?

Important Questions on Transient Current and Alternating Current

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.
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 6
Discuss the charging and discharging of a capacitor through a resistance. What is time constant of such a circuit ?
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 7
Show that both during charging and discharging of a capacitor through a resistance, the current starts with its maximum value and falls off exponentially.
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 8
When a d.c. circuit is switched often off a spark is observed. Explain in detail where that energy comes from?
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 9
Define the peak, mean and rms values of an alternating current and find the relation between the them. Explain why rms values of the current and voltage are more useful than the mean current.
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 10
Give a sketch of an a.c. generator and briefly explain the working principle.
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 11
State the major differences between a dynamo and a motor.