Write the dimensional formula for $\frac{L}{R},CR$ and $\sqrt{LC}$.

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 20

A circuit containing an inductor is switched off. What will be the direction of induced current at that instant?

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 21

Why a spark is observed when a circuit is switched off ?

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 22

A capacitor of capacitance $C$ is connected to a battery of emf $E$. What is the final charge on the capacitor and the energy stored in it. How much work is done by the battery?

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 23

In a given circuit, inductor $L$ and resistor $R$ have identical resistance. Two similar electric lamps $B_1$ and $B_2$ connected as shown in Fig. $10.58$. When switch $S$ is closed, which one of the lamps lights up earlier?

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 23

In a given circuit, inductor $L$ and resistor $R$ have identical resistance. Two similar electric lamps $B_1$ and $B_2$ connected as shown in Fig. $10.58$. When switch $S$ is closed, will the lamps be equally bright after some time? Justify your answer.

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 24

When the voltage and current in an AC circuit can be in phase?

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 25

What is power factor of an ac circuit?

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 26

Why alternating current measuring instruments has a nonlinear scale?