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

A charged cork of mass m suspended by a light string is placed in uniform electric field filed of strength `E = (hati+hatj) xx 10^(5)NC^(-1)` as shown in the figure. If in equilibrium position tension in the string is `2mg//(1+sqrt3)` the angle `alpha` with the vertical can be

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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