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In a certain region of space, there exists a uniform and constant electric field of strength E along x-axis and uniform constant magnetic field of induction B along z-axis. A charge particle having charge q and mass m is projected with speed v parallel to x-axis from a point (a, b, 0). When the particle reaches a point 2a, `b//2`, 0 its speed becomes 2v. Find the value of electric field strength in term of m, v and co-ordinates.

A

`(3)/(2)(mv^(2))/(qa)`

B

`(mv^(2))/(qb)`

C

`(2mv^(2))/(qa)`

D

`(mv^(2))/(2qa)`

Text Solution

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The correct Answer is:
a
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