The voltage of an a.c.supply varies with time (t) as V=120 sin 100 πt the maximum voltage

⇦

⇨

The voltage of an a.c.supply varies with time (t) as V=120 sin 100 πt cos 100 πt the maximum voltage and frequency are respectively

Options

(a) 120 V and 100 Hz
(b) 120√2 v and 100 Hz
(c) 60 V and 200 Hz
(d) 60 V and 100 Hz

Correct Answer:

60 V and 100 Hz

Explanation:

V = 120 sin 100 πt cos 100 πt

= 60 × 2 sin 100 πt cos 100 πt

= 60 × sin 200 πt

V(max) = 60 V

ω = 200 π

⇒ 2πf = 200 π

⇒ f = 100 Hz

⇒ 60 V and 100 Hz

Related Questions:

1. Which of the following combinations should be selected for better tuning of an L-C-R
2. A boat is sent across a river with a velocity of 8 km/h.If the resultant velocity
3. A boat taken 2h to travel 8km and back in still water.If the velocity of water 4 km/h
4. An artificial satellite is revolving round the earth in a circular orbit. Its velocity
5. A bimetallic strip consists of metals X and Y. It is mounted rigidly at the base as shown

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