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. The moment of inertia of a thin uniform rod of mass M and length L about an axis
  2. An electric dipole of moment ‘p’ is placed in an elecatric field of intensity ‘E’
  3. A soap bubble is charged to a potential 12V. If its radius is doubled,
  4. A filament bulb (500W,100V) is to be used in a 230V main supply. When a resistance
  5. Two spheres of mass m and M are situated in air and the gravitational force

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Your email address will not be published.


*