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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
- SI unit of permittivity is
- If λ₁ and λ₂ are the wavelengths of the first members of the Lyman and Paschen
- The horizontal component of earth’s magnetic field at a place is 3×10⁻⁴ T
- In a laser tube, all the photons
- The potential differences across the resistance, capacitance and inductance
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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