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Question

Mechanical advantage is equal to 


A
2πR×2πr
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B
2πR2πr
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C
2πR2πr
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D
None of these
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Solution

The correct option is C $$\displaystyle \frac{2\pi R}{2 \pi r}$$
solution :
mechanical advantage = $$\dfrac{distance- moved- by -the- effort }{distance -moved- by -the -load }$$
hence, the ratio of lengths i.e. $$\dfrac{R}{r}$$
hence , the correct opt: C

Physics

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