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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 ball is projected upwards from the foot of a tower. The ball crosses the top
- Two thin dielectric slabs of dielectric constants K₁ and K₂, (K₁ < K₂) are inserted
- Two cities are 150 km apart. Electric power is sent from one city to another city
- A capacitor having a capacity of 2 μF is charged to 200V and then the plates
- The wavelength of X-rays is in the range
Topics: Current Electricity (136)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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