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A block of mass m and charge q is connec...

A block of mass m and charge q is connected to a point 0 with help ofan inextensible string. The system in on a horizontal table. An electric field is switched on in direction perpendicular to string. What will be tension in string when it become parallel to electric field?

A

`(qE)/(2)`

B

`3qE`

C

`(qE)/(l)`

D

`(3qE)/(5)`

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