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|Exercise Exercises Assertion-reasoning|7 Videos
  • ALTERNATING CURRENT

    CENGAGE PHYSICS|Exercise Exercises Linked Comprehension|25 Videos
  • ALTERNATING CURRENT

    CENGAGE PHYSICS|Exercise Exercises Single Correct|63 Videos
  • OSCILLATIONS

    CENGAGE PHYSICS|Exercise QUESTION BANK|39 Videos
  • ATOMIC PHYSICS

    CENGAGE PHYSICS|Exercise ddp.4.3|15 Videos

Similar Questions

Explore conceptually related problems

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 a.c. circuit shown in fig, the main supply hs constant voltage but variable frequency. For what frequency will the voltage across the resistance R be maximum ?

Knowledge Check

  • In the a.c circuit shown in figure, the supply voltage has a constant r.m.s value but variable frquency f. Resonance frequency is

    A
    `10 Hz`
    B
    `100 Hz`
    C
    `1000 Hz`
    D
    `200 Hz`
  • In the a.c. circuit shown in the figure. The supply voltage has a constant r.m.s value V but varialbe frequency f . Resonance frequency in hertz is

    A
    10
    B
    100
    C
    1000
    D
    200
  • 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

    A
    100 Hz
    B
    500 Hz
    C
    300 Hz
    D
    None of these
  • Similar Questions

    Explore conceptually related problems

    Power in an ac circuit | Resonant frequency

    In the circuit shown in fig, the resonant frequency is

    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 the LCR circuit shown in figure (a) current will lead the voltage (2) rms value of current in 20 A (3) power factor of the circuit is (1)/(sqrt(2)) (4) voltage drop across resistance is 100 V

    In resonant circuit, at resonant frequency