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A body is under stress F and has Young’s modulus Y, then the energy stored per unit volume equals to
Options
(a) F²/2Y
(b) Y/2F²
(c) 2Y/F²
(d) 2F²/Y
Correct Answer:
F²/2Y
Explanation:
Energy stored per unit volume,
u = (1/2) x stress x strain
= (1/2) x stress x [stress/Young’s modulus]
( ·.· Young’s modulus = stress/strain)
= (1/2) x F x (F/Y) = F²/2Y.
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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 ratio of radii of planets A and B is K₁ and ratio of accelerations
- A thin and circular disc of mass M and radius R is rotating in a horizontal plane
- A current of 2A flows through a 2Ω resistor when connected across a battery
- An electromagnetic wave of frequency v = 3.0 MHz passes from vacuum into
- A radioactive substance decays to 1/16th of its initial activity in 40 days.
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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