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Which of the following rods of same material undergoes maximum elongation when subjected to a given force?
Options
(a) l=1 m, d=2 mm
(b) l=2 m, d=1 mm
(c) l=1 m, d=1 mm
(d) l=2 m, d=2 mm
Correct Answer:
l=2 m, d=1 mm
Explanation:
Δl(elongation) = Fl/YA
F is same. Young modulus is same.
.·. Δl α 1/r² .
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Topics: Properties of Bulk Matter
(130)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- The work function of a substance is 4.0 eV. The longest wavelength of light
- An electric motor runs on DC source of emf 200 V and draws a current of 10 A.
- By sucking through a straw, a student can reduce the pressure of his lungs
- A paramagnetic sample shows a net magnetisation of 0.8 Am⁻¹, when placed
- An ideal gas is compressed to half its initial volume by means of several processes.
Topics: Properties of Bulk Matter (130)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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