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. A particle of mass M is executing oscillations about the origin on the x-axis.
2. Two coherent sources of different intensities send waves which interfere.
3. In a potentiometer experiment two cells of e.m.f. E₁ and E₂ are used in series
4. Two point charge +9e and +e are at 16 cm away from each other.
5. Two equal and opposite charges of masses m₁ and m₂ are accelerated

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