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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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- 10 mA current can pass through a galvanometer of resistance 25 ohm.
- When a bullet of mass 10 g and speed 100 ms⁻¹ penetrates up to distance 1 cm
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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
- Two spherical nuclei have mass numbers 216 and 64 with their radii R₁ and R₂,
- 10 mA current can pass through a galvanometer of resistance 25 ohm.
- When a bullet of mass 10 g and speed 100 ms⁻¹ penetrates up to distance 1 cm
- The approximate depth of an ocean is 2700 m. The compressibility of water is
- 24 cells of emf 1.5 V each having internal resistance of 1 ohm are connected
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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