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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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Topics: Current Electricity
(136)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A circular disc of radius 0.2 meter is placed in a uniform magnetic field of induction
- A disc of mass 100 g is kept floating horizontally in air by firing bullets
- If the earth shrink such that its mass does not change but radius decreases to one
- Light of frequency 8×10¹⁵ Hz is incident on a substance of photoelectric work
- A ray of light is incident on a transparent glass slab of refractive index 1.62
Topics: Current Electricity (136)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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