Question

An ac voltage is applied to a resistance R and an inductor L in series. If R and the inductive reactance are both equal to 3Ω, the phase difference between the applied voltage and the current in the circuit is

• A. π/6
• B. π/4
• C. π/2
• D. zero

Answer 1

Answer: (B)

π/4

Answer 2

$\tan \phi^{-1}=\frac{ X _{ L }}{ R }$

= tan-1(3/3)

= tan-1(1)

= π/4 rad

$\phi=45^{\circ}$

Hence, option B) π/4 is the correct answer.