| ⇦ | 
| ⇨ |
In an a.c circuit the e.m.f. (e) and the current (i) at any instant are given respectively by
e = E₀ sin ?t
i = I₀ sin (?t – ?)
The average power in the circuit over one cycle of a.c. is
Options
(a) E₀I₀ / 2
(b) E₀I₀ / 2 sin ?
(c) E₀I₀ / 2 cos ?
(d) E₀I₀
Correct Answer:
E₀I₀ / 2 cos ?
Explanation:
The average power in the circuit over one cycle of a.c. is given by
Pₐᵥ = eᵣₘₛ x iᵣₘₛ x cos ?
= E₀ / √2 x I₀ / √2 x cos ? = E₀I₀ / 2 cos ?
Related Questions: - Suppose the kinetic energy of a body oscillating with amplitude A and at a distance
- When the energy of the incident radiation is increased by 20%,
- Thomson coefficient of a conductor is 10 µV/K. Its two ends are kept
- If an electron and a proton have the same de-Broglie wavelength, then the kinetic
- The de-Broglie wavelength of an electron in the first Bohr orbit is
Topics: Alternating Current
(96)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Suppose the kinetic energy of a body oscillating with amplitude A and at a distance
- When the energy of the incident radiation is increased by 20%,
- Thomson coefficient of a conductor is 10 µV/K. Its two ends are kept
- If an electron and a proton have the same de-Broglie wavelength, then the kinetic
- The de-Broglie wavelength of an electron in the first Bohr orbit is
Topics: Alternating Current (96)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
18000+ students are using NEETLab to improve their score. What about you?
Solve Previous Year MCQs, Mock Tests, Topicwise Practice Tests, Identify Weak Topics, Formula Flash cards and much more is available in NEETLab Android App to improve your NEET score.
Share this page with your friends
Leave a Reply