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A sphere of mass 50gm is suspended by a ...

A sphere of mass 50gm is suspended by a string in an electric field of intensity `5NC^(-1)` acting vertically upward. If the tension in the string is 520 milli newton, the charge on the sphere is `(g = 10 ms^(-2))`

A

`4 xx 10^(-3)C`

B

`-4 xx 10^(-3)C`

C

`8 xx 10^(-3)C`

D

`-8 xx 10^(3)C`

Text Solution

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The correct Answer is:
B
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