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One coolie takes 1 minute to raise a suitcase through a height of 2 m but the second coolie takes 30 s to raise the same suitcase to the same height. The powers of two coolies are in the ratio of
Options
(a) 1 : 2
(b) 1 : 3
(c) 2 : 1
(d) 3 : 1
Correct Answer:
1 : 2
Explanation:
power P = w / t
P₁ / P₂ = t₂ / t₁ = 30s / 1 minute = 30s / 60s = 1/2
(t₁ = 1 minute ; t₂ = 30 second given)
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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
- The rest energy of an electron is
- Two capacitors having capacitances C₁ and C₂ are charged with 120V and 200V batteries
- Two planets at mean distances d₁ and d₂ from the sun have their frequencies n₁ and n₂
- The ionisation energy of an electron in the ground state of helium atom is 24.6 eV.
- A wire of one metre length carries a constant current. The wire is bent to form
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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