| ⇦ | 
| ⇨ |
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: - Two point charge +9e and +e are at 16 cm away from each other.
- The radius of gyration of a solid sphere of radius r about a certain axis is r
- A solid which is transparent to visible light and whose conductivity increases
- A short circuited coil is placed in a magnetic field varying with time. Electrical
- If a magnetic substance is brought near the north or the south pole of a bar magnet
Topics: Alternating Current
(96)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Two point charge +9e and +e are at 16 cm away from each other.
- The radius of gyration of a solid sphere of radius r about a certain axis is r
- A solid which is transparent to visible light and whose conductivity increases
- A short circuited coil is placed in a magnetic field varying with time. Electrical
- If a magnetic substance is brought near the north or the south pole of a bar magnet
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