| ⇦ | 
| ⇨ |
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: - To measure the roughness of the surface of a material, which of the following microscope
- If a small sphere is let fall vertically in a large quantity of still liquid of density
- A gramophone record is revolving with an angular velocity ?. A coin is placed at
- The maximum wavelength of radiations emitted at 900K is 4 µm. What will be the maximum
- A potentiometer wire is 100cm long and a constant potential difference is maintained
Topics: Alternating Current
(96)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- To measure the roughness of the surface of a material, which of the following microscope
- If a small sphere is let fall vertically in a large quantity of still liquid of density
- A gramophone record is revolving with an angular velocity ?. A coin is placed at
- The maximum wavelength of radiations emitted at 900K is 4 µm. What will be the maximum
- A potentiometer wire is 100cm long and a constant potential difference is maintained
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