| ⇦ | 
| ⇨ |
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 m is driven by a machine that delivers a constant power k watts
- The induced emf in a coil of 10 H inductance in which current varies
- A current of 5 A is flowing at 220 V in the primary coil of a transformer. If the voltage
- If the binding energy of the electron in a hydrogen atom is 13.6 eV, the energy
- Equal charge q each are placed at the vertices AQ and B of an equilateral triangle
Topics: Alternating Current
(96)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A particle of mass m is driven by a machine that delivers a constant power k watts
- The induced emf in a coil of 10 H inductance in which current varies
- A current of 5 A is flowing at 220 V in the primary coil of a transformer. If the voltage
- If the binding energy of the electron in a hydrogen atom is 13.6 eV, the energy
- Equal charge q each are placed at the vertices AQ and B of an equilateral triangle
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