A particle of charge q and mass m enters a region of a transverse electric field of `E_(0)hatj` with initial velocity `v_(0)hati` . The time taken for the change in the de Broglie wavelength of the charge from the initial value of `lambda_(0)` to `lambda_(0)//3` is proportional to

Options

A. `(q)/(m)`
B. `(m)/(q)`
C. `sqrt((q)/(m))`
D. `sqrt((m)/(q))`

Answer

B