If the speed of body moving in circle is doubled and the radius is halved, its centripetal acceleration becomes

Eight times

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Four times

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Two times

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Sixteen times

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Solution

The correct option is A Eight times
Centripetal acceleration is given by $a = v^{2} / R$ . Hence, if v is doubled and R is halved, we get $a^{'} = 4 v^{2} / (R / 2) = 8 a$

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