⇦ | ⇨ |
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: - The temperature coefficient of resistance of an alloy used for making resistor is
- The approximate depth of an ocean is 2700 m. The compressibility of water is
- The ratio of specific charge of an α-particle to that of a proton is
- If a small sphere is let fall vertically in a large quantity of still liquid of density
- A hemispherical bowl of radius R is rotating about its axis of symmetry
Topics: Alternating Current
(96)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- The temperature coefficient of resistance of an alloy used for making resistor is
- The approximate depth of an ocean is 2700 m. The compressibility of water is
- The ratio of specific charge of an α-particle to that of a proton is
- If a small sphere is let fall vertically in a large quantity of still liquid of density
- A hemispherical bowl of radius R is rotating about its axis of symmetry
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