06a Radioactive Substances

Which of the following is true about an alpha particle?
I. It carries positive charge.
II. It can be deflected by a magnetic field. or electric field
III. It has high penetrating power.

Which of the following is true about a beta particle?
I. It can be stopped by a sheet of aluminium of a few mm thick.
II. It has high ionising power.
III. It is a high speed electron.

Diagram shows the deflection of alpha, beta and gamma rays after passing through an electric field.

Which of the following represents plate P and plate Q?

The figure shows the penetrating power of radioactive radiation P, Q and R using different material.

What are rays P, Q and R?

Which of the following is not a radioactive substance?

Among alpha ray, beta ray and gamma ray; gamma radiation is the most harmful radiation given out during radioactive decay because

What are the charges carried by alpha rays, beta rays and gamma rays?

Which of the following is not the effect of excessive exposure to radioactive radiation?

The radioisotope which is used to estimate the age of archeology specimen is

What type of radiation is used to kill cancer cells in the radiotherapy treatment?

Diagram shows the deflection of radioactive radiation.

Which of the following represents radiation L?

Which of the following is not a use of radioactive substances?
I. To study the age of ancient artefacts
II. To prevent the thinning of ozone layer
III. To control the thickness of substances

Which of the following statements about radioactive decay are true?
I. A process of disintegration of unstable nuclei to form more stable nuclei.
II. The decay process is spontaneous and random.
III. The decay of radioactive substances produce large amount of energy.

Which of the following is true about a gamma radiation?
I. It can be stopped by thick concrete.
II. It consists of high-power electromagnetic waves.
III. It is a high speed electron.

Which of the following is not a radioactive substance?

Which of the following are the uses of radioactive substances?
I. To detect the leaking of underground pipes
II. To study the age of ancient artefacts
III. To sterilize surgical instruments

Which of the following is not a use of radioactive substances?

The figure shows the penetrating power of alpha rays, beta rays and gamma rays by using material P, Q and R.

Which of the following is true about materials P, Q and R?

Which of the following radioactive substance is used to kill cancer cells?

A certain radioactive radiation can penetrate a piece of aluminium foil but is stopped by a lead block. This radiation is

A radioactive ray is unaffected by electrical and magnetic fields. What is this ray?

Which of the following radioactive rays can be used to monitor the thickness of materials such as paper, plastics and aluminium foil in production factories?