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A 1m long wire of diameter 0.31 mm has a resistance of 4.2Ω. If it is replaced by another wire of same material of length 1.5m and diameter 0.155 mm, then the resistance of wire is
Options
(a) 25.2Ω
(b) 0.6Ω
(c) 26.7Ω
(d) 0.8Ω
Correct Answer:
25.2Ω
Explanation:
No explanation available. Be the first to write the explanation for this question by commenting below.
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- A sound absorber attenuates the sound level by 20 dB. The intensity decreases
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Topics: Current Electricity
(136)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A conductor of length 5 cm is moved parallel to itself with a speed of 2 m/s,
- A sound absorber attenuates the sound level by 20 dB. The intensity decreases
- A thin equiconvex lens of refractive index 3/2 and radius of curvature 30 cm
- A black body is heated from 27° C to 127° C. The ratio of their energies of radiations
- Two coherent monochromatic beams of intensities I and 4I respectively, are superposed.
Topics: Current Electricity (136)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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