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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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Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Two coherent sources of intensity ratio α interfere. In interference pattern,
- At what angle should the two forces 2P and √2 P act,so that the resultant force is P√10?
- The particle executing simple harmonic motion has a kinetic energy K₀cos²ωt.
- A coil of 40 henry inductance is connected in series with a resistance of 8 ohm
- Watt hour mter measures
Topics: Current Electricity (136)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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