Value of power factor of L.C.R circuit which is in the state of resonance?

CBSE Class 12
1

Value of power factor of L.C.R circuit which is in the state of resonance?

2

image

  • At resonance, Inductive resistance (XL) is equal to capacitive resistance (Xc)
  • The Power factor is nothing but cosine of phase angle between voltage and current.
  • For RLC circuit, the pf is also given by
    image
  • Therefore, the value of power factor of L.C.R circuit which is in the state of resonance is unity (one).