In a crossed field, the magnetic field induction is 2.OT and electric field intensity is `20xx10^(3)v/m`. At which velocity the electron will travel In a straight line without the effect of electric and magnetic fields ?

Options

A. `20/1.6xx10^(3)ms^(-1)`
B. `10xx10^(3)ms^(-1)`
C. `20xx10^(3)ms^(-1)`
D. `40xx10^(3)ms^(-1)`

Answer

B

Explanation

`V=E/B`
`=(20xx10^(3))/(2)`
`=10xx10^(3)ms^(-1)`