If two electric bulbs have 40 W and 60 W ratings at 220 V, then the ratio

If Two Electric Bulbs Have 40 W And 60 W Physics Question

If two electric bulbs have 40 W and 60 W ratings at 220 V, then the ratio of their resistances will be

Options

(a) (3:2)
(b) (2:3)
(c) (3:4)
(d) (4:3)

Correct Answer:

(3:2)

Explanation:

P = V² / R

⇒ R₁ / R₂ = P₂ / P₁ = 60 / 40 = 3 / 2 = 3 : 2

Related Questions:

  1. Two cells, having the same e.m.f. are connected in series through an external resistance
  2. Which one of the following electrical meter has the smallest resistance?
  3. At the first minimum adjacent to the central maximum of a single-slit diffraction
  4. A particle moves along with x-axis.The position x of particle with respect to time
  5. A dip needle vibrates in a vertical plane perpendicular to magnetic meridian. The time

Topics: Magnetic Effects of Current and Magnetism (167)
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Your email address will not be published.


*