| ⇦ | 
| ⇨ |
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: - A particle of mass 1 mg has the same wavelength as an electron moving with a velocity
- A body of mass 120 kg and density 600 kg/m³ floats in water.
- If h is planck’s constant and λ is wavelength, h/λ has dimensions of
- An interference pattern was made by using red light. If the red light
- If longitudinal strain for a wire is 0.03 and its poisson’s ratio is 0.5
Topics: Alternating Current
(96)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A particle of mass 1 mg has the same wavelength as an electron moving with a velocity
- A body of mass 120 kg and density 600 kg/m³ floats in water.
- If h is planck’s constant and λ is wavelength, h/λ has dimensions of
- An interference pattern was made by using red light. If the red light
- If longitudinal strain for a wire is 0.03 and its poisson’s ratio is 0.5
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