Question

13
10.
The diagram in Fig. 12.17 shows
a radioactive source S placed in a
thick lead walled container. The
radiations given out are allowed to
pass through a magnetic field. The
magnetic field (shown as x) acts
perpendicular to the plane of
paper inwards. Arrows show the
paths of the radiations A, B and C.
(a) Name the radiations labelled
A. B and C.
(b) Explain clearly how you use
arrive at the answer in part (a​

Answer 1

Explanation:

For alpha particles the direction of deflection which can be determined by Fleming’s left hand rule demonstrates that they must be positively charged

they will deflect towards left side. So, B represents α particles

β particles will be opposite of α particles. So, C represents β particles.

γ rays are unaffected by a magnetic field. So, A represents γ rays.