Physics
The diagram in figure 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 used the diagram to arrive at the answer in part (a).
Answer
(a) The radiations are —
- A → γ radiation
- B → α radiation
- C → β radiation
(b) The radiation labelled as A pass undeviated which means that they are uncharged (or neutral) so they must be γ radiations.
The radiation labelled as B turn to the left which means that they are positively charged so they must be α radiations.
The radiation labelled as C turn to the right which means that they are negatively charged so they must be β radiations.
Related Questions
A radioactive source emits three type of radiations.
(a) Name the radiation of zero mass.
(b) Name the radiation which has the lowest ionising power.
(c) Name the radiation which has the lowest penetrating power.
(d) Give the charge and mass of particles composing the radiation in part (c).
(e) When the particle referred to in part (c) becomes neutral, it is found to be the atom of a rare gas. Name this rare gas and draw a model of it's neutral atom.
(f) From which part of the atom do these radiations come?
Figure shows a mixed source R of alpha and beta particles in a thick lead walled container. The particles pass through a magnetic field in a direction perpendicular to the plane of paper inwards as shown by x.
(a) Show in the diagram how the particles get affected.
(b) Name the law used in part (a)
A radioactive source emits three types of radiations.
(a) Name the three radiations.
(b) Name the radiations which are deflected by the electric field.
(c) Name the radiation which is most penetrating.
(d) Name the radiation which travels with the speed of light.
(e) Name the radiation which has the highest ionizing power.
(f) Name the radiation consisting of the same kind of particles as the cathode rays.
Figure shows a radioactive source S in a thick lead walled container having a narrow opening. The radiations pass through an electric field between the plates A and B.
(a) Complete the diagram to show the paths of α, β and γ radiations.
(b) Why is the source S kept in a thick lead walled container with a narrow opening?
(c) Name the radiation which is unaffected by the electrostatic field.
(d) Which radiation is deflected the most. Give reason.
(e) Which among the three radiations causes the least biological damage?