| ⇦ | 
| ⇨ |
A 220 volts input is supplied to a transformer. The output circuit draws a current of 2.0 ampere at 440 volts. If the efficiency of the transformers is 80%, the current drawn by the primary windings of the transformer is
Options
(a) 3.6 ampere
(b) 2.8 ampere
(c) 2.5 ampere
(d) 5.0 ampere
Correct Answer:
5.0 ampere
Explanation:
V₂ / V₁ = 0.8 I₁ / I₂
V₂I₂ / V₁I₁= 0.8
V₁ = 220 V, I₂ = 2.0 A, V₂ = 440 V
I₁ = V₂I₂ / V₁ x 10/8 = 440 x 2 x 10 / 220 x 8
= 5.0 A
Related Questions: - The number of photons of wavelength of 540 nm emitted per second by an electric bulb
- In photoelectric emission process from a metal of work function
- A moving neutron collides with a stationary α-particle.The fraction of the kinetic energy
- Velocities of sound measured in hydrogen and oxygen gas at a given temperature
- A glass flask weighing 390 g having internal volume 500 cc just floats
Topics: Alternating Current
(96)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- The number of photons of wavelength of 540 nm emitted per second by an electric bulb
- In photoelectric emission process from a metal of work function
- A moving neutron collides with a stationary α-particle.The fraction of the kinetic energy
- Velocities of sound measured in hydrogen and oxygen gas at a given temperature
- A glass flask weighing 390 g having internal volume 500 cc just floats
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