| ⇦ | 
| ⇨ |
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: - Wave nature of light is verified by
- The S.I. unit of electric flux is
- The Rutherford scattering experiment proves that an atom consists of
- If t₁ ̷ ₂ is the half-life of a substance, then t₃ ̷ ₄ is the time in which
- The concentric spheres of radii R and r have positive charges q₁ and q₂ with equal
Topics: Alternating Current
(96)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Wave nature of light is verified by
- The S.I. unit of electric flux is
- The Rutherford scattering experiment proves that an atom consists of
- If t₁ ̷ ₂ is the half-life of a substance, then t₃ ̷ ₄ is the time in which
- The concentric spheres of radii R and r have positive charges q₁ and q₂ with equal
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