Edison
Becquerel
Einstein
Rutherford

2. Radium was identified by

Bohr
Marie Curie and Pierre Curie
Thomson
Geiger

3. We can use the following apparatus to detect beta radiation except

Photographic film
Spark counter
GM Tube
Cloud Chamber

4. Among the 3 types of radiation, the alpha particle is not

the most penetraing
a helium particle
the heaviest
with the slowest travelling speed

5. When a radioactive atom emits beta particle, which of the following statments about the atom is/are correct?
(1) Its mass number remains unchanged.
(2) Its atomic number remains unchanged.
(3) An orbital electron is emitted

(1), (2) & (3)
(1) & (3)
(1) & (2)
(1) only

6. By what property of Americium does a smoke detector make use of: (1996):

Effect of magnetic field on radiation
Penetrating property
Ionising property
All of the above

7. What kind of radioisotope should be used when detecting leakeages?

Alpha
Beta
Gamma
All of the above

8. Which of the following nuclides is fissile?

uranium-235
gold-197
carbon-12
beryllium-9

9. Which of the following is not used to control the temperature of nuclear reactors?

liquid sodium
water
graphite
nitrogen

10. Which country has the highest percentage of its electricity generated from nuclear power plants?

France
United States
Japan
Germany