Question

Find the time required for it to make half of a revolution.

Answer 1

Under the action of magnetic field,

$\frac{m{v}^2}{r}=qvB$

$⟹mv=qBr$

Time period of the revolution=$\frac{2\pi r}{v}=\frac{2\pi m}{qB}$

Time required to make half a revolution=$\frac{T}{2}$

$=\frac{\pi m}{qB}$

$=\frac{\pi \times 3.34\times {10}^{-27}}{1.6\times {10}^{-19}\times 2.5}$

$=2.62\times {10}^{-8}s$