NEET2015Physics-Work, Energy and Power
NEET 2015 Physics Elastic Potential Energy MCQ Question
Type: MCQ-conceptual-Medium-Class 11
Two similar springs P and Q have spring constants Kₚ and KQ such that Kₚ > KQ. They are stretched first by the same amount (case a), then by the same force (case b). The work done by the springs Wₚ and WQ are related as, in case (a) and case (b), respectively
A
Wₚ = WQ ; Wₚ > WQ
B
Wₚ > WQ ; Wₚ = WQ
C
Wₚ > WQ ; Wₚ > WQ
D
Wₚ < WQ ; Wₚ < WQ
Correct Answer
Option B
Detailed Explanation
In case (a), the work done is the same because the extension is the same. In case (b), the work done by P is greater because it has a higher spring constant.
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