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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
(94)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A stone of mass 1kg is tied to a string 4m long and is rotated at constant speed
- Out of the following options which one can be used to produce a propagating
- If the velocity of charged particle has both perpendicular and parallel components
- In an inductor when current changes from 2 A to 18 A in 0.05 sec, the e.m.f. induced
- A charged particle with a velocity 2×10³ ms⁻¹ passes undeflected through electric field
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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