Home
Class 12
PHYSICS
The phase angle between the current and ...

The phase angle between the current and voltage in an L-R circuit is `30^(@)`. What is the impendance of the circuit if the resistance in the circuit is `10sqrt(3) Omega`?

A

`10 Omega`

B

`15 Omega`

C

`20 Omega`

D

`30 Omega`

Text Solution

Verified by Experts

The correct Answer is:
C
Power factor = `cos theta = cos 30^(@) = (sqrt3)/2`
Power factor = `R/Z`
`:. Z = R/(cos phi) = (10sqrt(3))/(sqrt(3)//2)= 20 Omega`.
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • ELECTROMAGNETIC INDUCTION AND ALTERNATING CURRENTS

    MARVEL PUBLICATION|Exercise TEST YOUR GRASP - 16|30 Videos

  • ELASTICITY

    MARVEL PUBLICATION|Exercise Test Your Grasp - 5|15 Videos

  • ELECTRONS AND PHOTONS

    MARVEL PUBLICATION|Exercise TEST YOUR GRASP - 17|15 Videos

Similar Questions

Explore conceptually related problems

A series RL circuit is connected to an AC power supply of 120 V . The frequency of source is 50 Hz. Calculate the phase difference between the current and voltage in the circuit if values of R and L are 10 Omega and 0.01 H, respectively. Also find the current in the circuit .

The phase difference between voltage and current in an LCR series circuit is

Knowledge Check

  • The phase angle between current and voltage in a purely inductive circuit is

    A
    zero
    B
    `pi`
    C
    `pi//4`
    D
    `pi//2`

  • The phase difference between the current and voltage of LCR circuit in series combination at resonance is

    A
    `0`
    B
    `pi//2`
    C
    `pi`
    D
    `-pi`

  • The phase difference between voltage and current in series L-C circuit is

    A
    `0^(@)`
    B
    `pi`
    C
    `(pi)/(2)`
    D
    `(pi)/(3)`

    • Similar Questions

    Explore conceptually related problems

    The phase relationship between current and voltage in a pure resistive circuit is best represented by

    Phase differnece between voltage and current in a capacitor in AC circuit is

    Phase difference between voltage and current in a capacitor in an ac circuit is

    If the phase difference between voltage and current is pi//6 and the resistance in the circuit is sqrt(300) Omega , then the impedance of the circuit will be

    In an electrical circuit R,L,C and an AC voltage source are all connected in series. When L is removed from the circuit, the phase difference between the voltage and the current in the circuit is pi//3 . If instead, C is removed from the circuit, difference the phase difference is again pi//3 . The factor of the circuit is

    Home
    Profile