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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
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Subject: Physics
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Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- When a current of (2.5±0.5) A flows through a wire, it develops a potential difference
- A wire of length 2 m is made from 10 cm³ of copper. A force F is applied so that
- The velocity of sound is V, in air. If the density of air is increased to four times
- An α-particle moves in a circular path of radius 0.83 cm in the presence of a magnetic
- A thin convex lens of refractive index 1.5 has 20 cm focal length in air. If the lens
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Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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