An electric field of 1500 V/m and a magnetic field of 0.40 weber/metre act on a moving electron. The minimum uniform speed along a straight line the electron could have is

Options

A. `1.6 xx 10^(15) m/s`
B. `6 xx 10^(-16) m//s`
C. `3.75 xx 10^3 m//s`
D. `3.75 xx 10^2 m//s`

Answer

c

Explanation

When electron moves in both electric and magnetic field then `qE = qvB`
:. `v=(E)/(B)=(1500)/(0.40)=3750m//s=3.75xx10^(3)m//s`