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An electron gun G emits electrons of en...

An electron gun ` G` emits electrons of energy `2ke V` travelling in the positive ` x- direction` . The electrons are required to hit the spot `S` where `GS = 0.1m`, and the line `GS` makes an angle of `60^(@)` with the ` x-axis` as shown in the fig. A uniform magnetic field `vec(B)` parallel to `GS` exists in the region outside the electron gun. Find the `GS` exists in the region outside the electron gun. Find the minimum value of `B` needle to make the electron hit `S`.

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