Question

Alpha particle charge 2e moves along a circular path of radius 1 angstrom with a uniform speed of 2 into 10 raise to power 6 metre per second calculate the magnetic field produced at the centre of the circular path

Answer 1

time period(T)=2*pi*r/v

equivalent current (i) =2e/T

k= 4pi*10^-7

magnetic field =ki/2r

put the values to get the answer