A 220 volts input is supplied to a transformer. The output circuit draws

A 220 Volts Input Is Supplied To A Transformer The Physics Question

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:

  1. If threshold wevelength for sodium is 6800 Å, the work function will be
  2. Current in a coil changes from 4 A to zero in 0.1 second and the emf induced is 100V
  3. A bimetallic strip consists of metals X and Y. It is mounted rigidly at the base as shown
  4. A heavy small sized sphere is suspended by a string of length l.The sphere rotates
  5. A choke is preferred to a resistance for limiting current in AC circuit because

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.

NEETLab Mobile App

Share this page with your friends

Be the first to comment

Leave a Reply

Your email address will not be published.


*