Choose the correct phase relationship between the current and the applied voltage in an a.c. circuit.
(A) In a pure resistive circuit, the current is in phase with the applied voltage.
(B) In a pure inductive circuit, the current lags behind the voltage by a phase angle of 90°.
(C) In a pure inductive circuit, the current leads the voltage by a phase angle of 90°.
(D) In a pure resistive circuit, the current is not in phase with the applied voltage.
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → (A) and (B) only
(A) Correct — In a purely resistive circuit, current and voltage are in the same phase.
(B) Correct — In a purely inductive circuit, current lags the applied voltage by $90^\circ$.
(C) Incorrect — In an inductive circuit, current lags, it does not lead.
(D) Incorrect — For a resistive circuit, current is exactly in phase with voltage.
Final Answer: (A), (B)