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A beam of protons enters a uniform magne...

A beam of protons enters a uniform magnetic field of 0.3 tesla with a velocity of `4xx10^(5)` m/s at an angle of 60º to the field. Then, (Mass of the proton `=1.7 xx10^(-27)` kg.)
(1) the radius of the helical path is `1.226 xx 10^(-2)` m
(2) the pitch of the helix is `4.45 xx 10^(-2)` m
(3) the radius of the helical path is `1.226 xx 10^(-3)` m
(4) the pitch of the helix is `4.45xx10^(-4)` m

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