Home
Class 12
PHYSICS
The power factor of an AC circuit having...

The power factor of an AC circuit having resistance (R) and inductance (L) connected in series and an angular velocity `omega` is

A

`R//omegaL`

B

`R//(R^2+omega^2L^2)^(1//2)`

C

`omegaL//R`

D

`R//(R^2-omega^2L^2)^(1//2)`

Text Solution

Verified by Experts

The correct Answer is:
B
`cos phi=R/Z=R/(sqrt(R^2+omega^2L^2))`
Promotional Banner

Similar Questions

Explore conceptually related problems

The quality factor of LCR circuit having resistance ( R ) and inductance ( L ) at resonance frequency (omega ) is given by

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

In an A.C. circuit, a resistance R=40 Omega and an inductance L are connected in series. If the phase angle between voltage and current is 45^(@) , then the value of the inductive reactance will be

A circuit consists of a capacitor with capacitance C and a coil with active resistance R and inductance L connected in parallel. Find the impedane of the circuit at frequency omega of alternating voltage.

An inductor has a resistance R and inductance L .It is connected to an A.C source of e.m.f E_(v) and angular frequency omega , then the current I_(v) in the circuit is

An inductance L and capacitance C and resistance R are connected in series across an AC source of angular frequency omega . If omega^(2)gt (1)/(LC) then

An inductance and a resistance are connected in series with an AC potential . In this circuit

An inductor has a resistance R inductance L . It is connected to an A.C source of e.m.f. E_(V) and angular frequency omega then the current I_(v) in the circuit is

A resistance R and an inductance L are connected in series in an a.c. circut. If omega is the angular frequency of the source, then the power factor is given by