| ⇦ | 
| ⇨ |
If an A.C. mains supply is given to be 220 V, what would be the average e.m.f. during a positive half cycle?
Options
(a) 256 V
(b) 512 V
(c) 386 V
(d) 198 V
Correct Answer:
198 V
Explanation:
Vₐᵥ = 2V₀ / π = (2 / π) [V(rms) × √2] = (2√2 / π) × V(rms)
Vₐᵥ = (2√2 / π) × 220 = 198 V
Related Questions: - A galvanometer having resistance of 50 Ω requires a current of 100μA to give full
- A ball of mass 2 kg and another of mass 4 kg are dropped together from
- The electric field associated with an e.m. wave in vacuum is given by
- Two 220V – 100W bulbs are connected first in series and then in parallel.
- If the angular momentum of any rotating body increase by 200 % , then the increase
Topics: Alternating Current
(96)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A galvanometer having resistance of 50 Ω requires a current of 100μA to give full
- A ball of mass 2 kg and another of mass 4 kg are dropped together from
- The electric field associated with an e.m. wave in vacuum is given by
- Two 220V – 100W bulbs are connected first in series and then in parallel.
- If the angular momentum of any rotating body increase by 200 % , then the increase
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