A charged particle with a velocity `2xx10^(3) ms^(-1)` passes undeflected through electric field and magnetic fields in mutually perpendicular directions. The magnetic field is `1.5 t. the magnitude of electric field will be
A. `1.5xx10^(3) NC^(-1)`
B. `2xx10^(3)NC^(-1)`
C. `3xx10^(3)NC^(-1)`
D. `1.33xx10^(3)NC^(-1)`