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In a conical pendulam, when the bob move...

In a conical pendulam, when the bob moves in a horizontal circle of radius r with uniform speed v, the string of length L describes a cone of semivertical angle `theta`. The tension in the string is given by

A

`T=mgL/sqrt(L^2 - r^2)`

B

`T=((L^2 - r^2)^1/2)/mgL`

C

`T=mgL/(L^2 - r^2)`

D

`T=mgL/(L^2 - r^2)^2`

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