The phase angle between the voltage and the current in an LR series circuit having the same resistance as its reactance is
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → \( 45^\circ \)
In a series LR circuit the phase angle \( \phi \) between voltage and current is fixed by the ratio of the inductive reactance to the resistance.
\( \displaystyle \tan\phi = \frac{X_L}{R} \)
Here \( X_L = R \), so
\( \displaystyle \tan\phi = 1 \;\Rightarrow\; \phi = 45^\circ \)
The voltage leads the current by \( 45^\circ \).