A metal wire of circular cross-section has a resistance R₁. The wire is now stretched

A Metal Wire Of Circular Crosssection Has A Resistance R Physics Question

A metal wire of circular cross-section has a resistance R₁. The wire is now stretched without breaking, so that its length is doubled and the density is assumed to remain the same. If the resistance of the wire now becomes R₂, then R₂:R₁ is

Options

(a) (1:1)
(b) (1:2)
(c) (4:1)
(d) (1:4)

Correct Answer:

(4:1)

Explanation:

No explanation available. Be the first to write the explanation for this question by commenting below.

Related Questions:

  1. Two bodies A and B have masses 20 Kg and 5 Kg respectively. Each one is acted
  2. The limiting angle of incidence for an optical ray that can be transmitted
  3. If a mass of 20g having charge 3.0 mC moving with velocity 20ms⁻¹ enters a region
  4. The velocity of a particle at an instant is 10 ms⁻¹ and after 5 s the velocity
  5. If the radioactive dacay constant of radium is 1.07 x 10⁻⁴ year⁻¹, then its half-life

Topics: Current Electricity (136)
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Your email address will not be published.


*