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What is the radius of the path of an ele...

What is the radius of the path of an electron `(mass 9 xx 10^(-31)kg and q= 1.6 xx 10^(-19)C)` moving at a speed of ` 3 xx 10^(7) ms^(-1)` in a magnetic field of `6 xx 10^(-4)T` perpendicular to it? What is the frequency? Calculate energy in Kev `(1eV = 1.6 xx 10^(-19)J)`

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