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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 beam of electron passes undeflected through mutually perpendicular
- A 1kg stone at the end of 1 m long string is whirled in a vertical circle at constant speed
- The equation of state for 5 g of oxygen at a pressure P and temperature T,
- A stone is tied to a string of length l and whirled in a vertical circle with the other end
- Which of the following atoms has the lowest ionisation potential?
Topics: Current Electricity (136)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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