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The electric resistance of a certain wire of iron is R. If its length and radius are both doubled, then
Options
(a) The resistance will be doubled and the specific resistance will be halved
(b) The resistance will be halved and the specific resistance will remain unchanged
(c) The resistance will be halved and the specific resistance will be doubled
(d) The resistance and the specific resistance both will remain unchanged
Correct Answer:
The resistance will be halved and the specific resistance will remain unchanged
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 gas is suddenly expanded such that its final volume becomes 3 times
- An electric motor runs on DC source of emf 200 V and draws a current of 10 A.
- A car moving with a speed of 50 kmh⁻¹ can be stopped by brakes after at least 6 m
- In a laser tube, all the photons
- The electric potential at a point in free space due to a charge Q coulomb is Q x 10¹¹ v
Topics: Current Electricity (136)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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