Home
Class 12
PHYSICS
Assertion: The alternating current lags ...

Assertion: The alternating current lags behined the e.m.f. by a phase angle of `pi//2`, when `AC` flows through an inductor.
Reason: The inductive reactance increases as the frequency of `AC` source decreases.

A

If both assertion and reason are true and the reason is the correct explanation of the assertion.

B

If both assertion and reason are true but reason is not the correct explanation of the assertion.

C

If assertion is true but reason is false.

D

If the assertion and reason both are false

Text Solution

Verified by Experts

The correct Answer is:
C
`X_(L) = omega L , omega uarr X_(L) uarr`
Promotional Banner

Topper's Solved these Questions

  • ALTERNATING CURRENT

    ERRORLESS|Exercise Past Years Questions|30 Videos

  • ATOMIC AND NUCLEAR PHYSICS

    ERRORLESS|Exercise Assertion and Reason|23 Videos

Similar Questions

Explore conceptually related problems

How does inductive reactance vary when frequency of a.c. source in the circuit is halved ?

A variable inductor inductor is connected to an AC source. When inductance increases, The reactance

The impedance of a circuit, when a resistance R and an inductor of inductance are connected in series in an AC circuit of frequency f is

Assertion : In a practical choke coil, power factor is very small. Reason : In a practical choke coil, heat dissipation reduces when frequency of AC source is increased.

Assertion: If the frequency of alternating current in an AC is circuit consisting of an inductance coil is increased then current gets decreased. Reason: The current is inversely proportional to frequency of alternating current.

The current through an inductor of impedance 10Omega lags behind the voltage by a phase of 60^(@) when just the inductor is connected to the ac source. Now the inductor is connected to a 5Omega resistance in series, then the net impedance of the circuit is

Calculate the reactance of 10 m H inductor connected to an AC source with frequency of 100 Hz.

Assertion : There can be induced e.m.f. in an inductor even if the current through it is zero. Reason : Induced e.m.f. depends upon the rate of change of current rather than the current itself.