1.

A charged particle with charge to mass ratio `((q)/(m)) = (10)^(3)/(19) Ckg^(-1)` enters a uniform magnetic field `vec(B) = 20 hat(i) + 30 hat(j) + 50 hat(k) T` at time t = 0 with velocity `vec(V) = (20 hat(i) + 50 hat(j) + 30 hat(k)) m//s`. Assume that magnetic field exists in large space. The frequency (in Hz) of the revolution of the particle in cycles per second will beA. `(10^3)/(pisqrt(38))`B. `(10^4)/(pisqrt(38))`C. `(10^4)/(pisqrt(19))`D. `(10^4)/(2pisqrt(19))`

Answer» Correct Answer - B
`f=(qB)/(2 pi m) = (10^3)/(19) xx (sqrt(3800))/(2 pi) = (10^(4))/(pisqrt(38))`.


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