An electron is shot in steady electric and magnetic field E and magnetic field B mutually perpendicular. The magnitude of E is `

An electron is shot in steady electric and magnetic field E and magnetic field B mutually perpendicular. The magnitude of E is `1` volt `//` cm and that of B is 2 tesla. Now it happens that the Lorentz ( Magnetic ) force cancels with the electro static force on the electron, then the velocity of the electron is
A. `50ms^(-1)`
B. `2 cm^(-1)`
C. `0.5cm^(-1)`
D. `200ms^(-1)`

An electron is shot in steady electric and magnetic field E and magnetic field B mutually perpendicular. The magnitude of E is `1` volt `//` cm and th

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