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A charges cork of mass m suspended by a ...

A charges cork of mass m suspended by a light stright is placed in uniform electric field strength `E=(hat(i)+hat(j))xx10^(5) NC^(-1)` as shown in the figure. If in equilibrium position tension in the string is `(2mg)/((1+sqrt(3)))` then angle `'alpha'` with the vertical is:

A

`60^(@)`

B

`30^(@)`

C

`45^(@)`

D

`18^(@)`

Text Solution

Verified by Experts

The correct Answer is:
A, B
`T sin alpha=qE cos 45^(@)` and `T cos alpha+qE sin 45^(@)=mg`
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