ln an AC circuit, the current lags behind the voltage by π/3. The components of the circuit are

Question

ln an AC circuit, the current lags behind the voltage by π/3. The components of the circuit are (A) R and L (B) L and C (C) R and C (D) only R

Tardigrade Admin · Accepted Answer

Since, current lags behind the voltage in phase by a constant angle, then circuit must contain R and L.
We find that in R-L circuit, voltage leads the current by a phase angle

ϕ

, where

tan ϕ = \frac{A K}{O A} = \frac{O L}{O A}

= \frac{V _{L}}{V _{R}} = \frac{I _{0} X _{L}}{I _{0} R}

∴ t an ϕ = \frac{X _{L}}{R}

Q. ln an AC circuit, the current lags behind the voltage by π/3. The components of the circuit are

R and L

L and C

R and C

only R

Since, current lags behind the voltage in phase by a constant angle, then circuit must contain R and L. We find that in R-L circuit, voltage leads the current by a phase angle ϕ, where tanϕ=OAAK​=OAOL​ =VR​VL​​=I0​RI0​XL​​ ∴tanϕ=RXL​​

Q. ln an AC circuit, the current lags behind the voltage by $π$ /3. The components of the circuit are