Asked in Premeth 2025 — Biomolecules, Nuclear Physics, Alternating Current, Comprehension 2025

In an A.C circuit with resistor only, the current and voltage have a phase angle of:

Correct answer: B. 0o

  • A. 90o
  • B. 0o
  • C. 180o
  • D. None of these

Explanation

This is the correct answer. In a purely resistive A.C circuit, the current and voltage are in phase with each other, meaning they are synchronized and have no phase difference. They reach their maximum values and change direction simultaneously.

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About AC Through Resistor, Capacitor and Inductor

Alternating current through a resistor, capacitor and inductor involves phase relationships between voltage and current, reactance, impedance and energy transfer. A resistor keeps voltage and current in phase, while a capacitor and inductor produce opposite phase shifts, a distinction used in circuit diagrams and numerical calculations.

Practise Alternating Current

592 free Alternating Current MCQs from Physics, each with the correct answer and an explanation. Unlimited attempts, no account needed.

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