جوہری اور مرکزی طبیعیات

Which radiation is the most penetrating?

• 1 All equal
• 2 Gamma
• 3 Alpha
• 4 Beta

An alpha particle is the same as a:

• 1 Hydrogen nucleus
• 2 Helium nucleus
• 3 Neutron
• 4 Electron

A sample has a half life of 4 days. What fraction remains after 12 days?

• 1 1/16
• 2 1/8
• 3 1/4
• 4 1/2

The splitting of a heavy nucleus into lighter nuclei is called:

• 1 Fission
• 2 Fusion
• 3 Ionisation
• 4 Evaporation

The energy of the Sun comes from nuclear:

• 1 Fusion
• 2 Fission
• 3 Combustion
• 4 Decay only

A device used to detect radiation is the:

• 1 Thermometer
• 2 Voltmeter
• 3 Barometer
• 4 Geiger Muller counter

Which radiation is stopped by a sheet of paper?

• 1 Beta
• 2 X rays
• 3 Alpha
• 4 Gamma

Carbon-14 is used for:

• 1 Cooling
• 2 Making steel
• 3 Lighting
• 4 Dating ancient objects

Radioactive decay is a:

• 1 Process that needs light
• 2 Random process
• 3 Process we can start at will
• 4 Chemical reaction