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A spring when stretched by 2mm containing energy 4 J. If it is stretched by 10 mm, its potential energy becomes equal to
Options
(a) 4 J
(b) 54 J
(c) 415 J
(d) None of these
Correct Answer:
None of these
Explanation:
E₁ = 1/2 Kx₁², E₂ = 1/2 Kx₂²
E₂ / E₁ = x₂² / x₁² = (10/2)² =25
E₂ = 25 E₁
But E₁ = 4 J
E₂ = 100 J
This alternative is not given. Hence answer is ‘none’
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Topics: Work Energy and Power
(94)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- The mean distance between the atoms of iron is 3 x 10⁻¹⁰ m and interatomic force
- If an A.C. mains supply is given to be 220 V, what would be the average e.m.f.
- A certain number of spherical dropes of a liquid of radius r coalesce to form a single
- Two charged spheres seperated at a distance d exert a force F on each other.
- Which of the following is not a thermodynamical coordinate?
Topics: Work Energy and Power (94)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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