A uniform magnetic field of induction B is confined to a cylindriacal region of radius R. The magnetic field is increasing at a constant rate of `(Db)/(dt)). Am electron of charge e, placed at the point P on the preriphery of the field experiences accceleration.

Options

A. `1/2(eR)/m(dB)/(dt)` toward left
B. `1/2(eR)/m(dB)/(dt)` toward right
C. `(eR)/m(dB)/(dt)` toward left
D. zero

Answer

A

Explanation

`a=(qE)/m=1/2(eR)/m(dB)/(dt)`.towards left