In a crossed field, the magnetic field induction is $2.0 \,T$ and electric field intensity is $20 \times 10^3 \,V/m$. At which velocity will the electron travel in a straight line without being deflected by the electric and magnetic fields?
- A$1.25 \times 10^3 \,m/s$
- B$10 \times 10^3 \,m/s$
- C$20 \times 10^3 \,m/s$
- D$40 \times 10^3 \,m/s$
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