Please solve 31 electron moves witn a
Ans. 01705 metre.
mv2 R B q
We have, Bqv — R
9-1 X 10-31 K 3 x 107
10-3 x 1-6 x 10-19
31. An electron having energy 200 eV describes a circle in a magnetic
field of induction 4 x 10-2 weber/rn2. calculate (a) radius of the circle
and (2) frequency of the revolution.
10-2 metre; (b) ll•3X IOS HZ.
An alpha particle of energy 2 MeV moves on a circular path in a
magnetic field. Calculate the energy of a proton so that it may also
descnbe a circular path of same radius in the same field.
Ans. 2MeV.