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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.
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Subject: Physics
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Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A magnetic force acting on a charged particle of charge -2µC in a magnetic field of 2T
- A body of mass m is placed on the earth’s surface. It is taken from the earth’s surface
- If the temperature of the sun were to increase from T to 2T and its radius from R and 2R
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- If a magnet is suspended at an angle 30⁰ to the magnetic meridian, the dip needle
Topics: Current Electricity (136)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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