| ⇦ | 
| ⇨ |
The instantaneous values of alternating current and voltages in a circuit are given as
i = 1/√2 sin (100πt) amper
e = 1/√2 sin (100πt + π/3) Volt
The average power in Watts consumed in the circuit is:
Options
(a) 1/4
(b) √3 / 4
(c) 1/2
(d) 1/8
Correct Answer:
1/8
Explanation:
The average power in the circuit where cos ? = power factory
= Vᵣₘₛ x Iᵣₘₛ cos ?
? = π/3 = phase difference = 180/3 = 60
Vᵣₘₛ = 1/√2 / √2 = 1/2 volt
Iᵣₘₛ = 1/√2 / √2 = (1/2) A
cos ? = cos π/3 = 1/2
= 1/2 x 1/2 x 1/2 = 1/8 W
Related Questions: - A rectangular coil of length 0.12 m and width 0.1 m having 50 turns of wire
- Heat is supplied at constant pressure to diatomic gas. The part of this heat that goes
- 1 Wb/m² equal to
- A bar magnet with magnetic moment 2.5×10³ JT⁻¹ is rotating in horizontal plane
- ₆C¹⁴ absorbs an energitic neutron and emits beta particles. The resulting nucleus is
Topics: Alternating Current
(96)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A rectangular coil of length 0.12 m and width 0.1 m having 50 turns of wire
- Heat is supplied at constant pressure to diatomic gas. The part of this heat that goes
- 1 Wb/m² equal to
- A bar magnet with magnetic moment 2.5×10³ JT⁻¹ is rotating in horizontal plane
- ₆C¹⁴ absorbs an energitic neutron and emits beta particles. The resulting nucleus 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