Home
Class 12
PHYSICS
In an ac circuit shown in fig , the supp...

In an ac circuit shown in fig , the supply voltage has a constant rms value v but variable frequency f. At resonance, the circuit

A

has current I given by `I=(V)/(R )`

B

has a resonance frequenv=cy 500 Hz

C

has a voltage across the capacitor which is `180^(@)` out of phase with that across the inductor

D

Has a current given by `I=(V)/(sqrt(R^(2)+((1)/(pi)+(1)/(pi))^(2))`

Text Solution

Verified by Experts

The correct Answer is:
A, C
`f_(res)=(1)/(2 pi sqrt(LC)) = (1)/(2 pi sqrt(1/(pi) xx(1)/(pi) xx 10^(-6)) = 500 Hz`
At resonace, Z=R,
so current `I=V/Z = V/R`
When L and C are in sereis, voltage across capacitor and inductor is `18^(@)` out of phase.
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • ALTERNATING CURRENT

    CENGAGE PHYSICS ENGLISH|Exercise Exercises Assertion-reasoning|7 Videos

  • ALTERNATING CURRENT

    CENGAGE PHYSICS ENGLISH|Exercise Exercises Linked Comprehension|25 Videos

  • ALTERNATING CURRENT

    CENGAGE PHYSICS ENGLISH|Exercise Exercises Single Correct|63 Videos

  • ATOMIC PHYSICS

    CENGAGE PHYSICS ENGLISH|Exercise ddp.4.3|15 Videos

Similar Questions

Explore conceptually related problems

In the circuit shown in figure , the supply has a constant rms value V but variable frequency f. The frequency at which the voltage drop across R is maximum is

In an AC circuit as shown in the figure, the source is of r.m.s voltage 200 V and variable frequency. At resonance, the circuit

In the circuit shown in fig. (a), final the value of R_(C) .

In the circuit shown in Fig. 5.79, determine the voltage drop between A and D.

In the circuit shown if fig, the rms currents (I_1), (I_2) and (I_3) are altered by varying the frequency f of the oscillator. The output voltage of the oscillator remains sinusoidal and has a fixed amplitude. When curves in figure correctly indicate the variation with frequency of the currents (I_1), (I_2),and (I_3) .

An inductor L and a capacitor C are connected in the circuit as shown in the figure. The frequency of the power supply is equal to the resonant frequency of the circuit. Which ammeter will read zero ampere

In an AC circuit with voltage V and current I , the power dissipated is

In a series L-C-R circuit shown in the figure , what is the resonance frequency and the current at the resonating frequency?

In a series LCR circuit, the frequency of the source is more than resonance frequency. The current in the circuit leads the voltage in phases(True/false).

The electric current in AC circuit is given by the relation i = 3sinomegat + 4cosomegat . The rms value of the current in the circuit in ampere is

Home
Profile