A beam of electrons is under the effect of potential difference of `1.36xx10^(4)` volt applied across two parallel plates `4 cm` apart and a magnetic field of `0.002 Wbm^(-2)` at right angles to each other. If these two field produces no deflection in the beam. find the velocity of electrons. What will be radius of the orbit in which the beam will move, if the electric field is made zero ? Given, Mass of electron `=9.1xx10^(-31)kg`.

A beam of electrons is under the effect of potential difference of `1.

1.	A beam of electrons is under the effect of potential difference of `1.36xx10^(4)` volt applied across two parallel plates `4 cm` apart and a magnetic field of `0.002 Wbm^(-2)` at right angles to each other. If these two field produces no deflection in the beam. find the velocity of electrons. What will be radius of the orbit in which the beam will move, if the electric field is made zero ? Given, Mass of electron `=9.1xx10^(-31)kg`.
Answer» Correct Answer - `1.7 xx 10^(8) ms^(-1), 0.4834 m`

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