Target Exam

CUET

Subject

Physics

Chapter

Alternating Current

Question:

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:

Options:

(A) and (B) only

(A) and (C) only

(C) and (D) only

(B) and (D) only

Correct Answer:

(A) and (B) only

Explanation:

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)