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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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(136)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- The direction of magnetic line of force of a bar magnet is
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- A uniform rod of length l is placed with one end in contact with the horizontal
- The angle of incidence at which reflected light is totally polarised for refraction
- The mean radius of the earth is R, its angular speed on its own axis is ?
Topics: Current Electricity (136)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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