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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
- An interference pattern was made by using red light. If the red light
- If the force exerted by an electric dipole on a charge q at a distance of 1 m is F
- A force acts on a 3.0 g particle in such a way that the position of the particle
- Energy stored in the coil of a self inductance 40 mH carrying a steady current of 2A
- A particle is moving such that its position coordinates (x,y) are (2 m,3 m) at time
Topics: Current Electricity (136)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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