Question Detail

If no external force acts on a system of bodies, the total linear momentum of the system of bodies remains constant. Which law states this ?

Newton first law
Newton second law
Newton third law
Principle of conservation of linear momentum

Answer: Option D

1. The absorption of ink by blotting paper involves

capillary action phenomenon
viscosity of ink
siphon action
diffusion of ink through the blotting

Answer: Option A

2. Which instrument is used to measure the scattering of light by particles suspended in a liquid ?

Nephetometer
Ohmmeter
Ondometer
Pyrometer

Answer: Option A

Explanation:

Ohmmeter - is used to measure electrical resistance in ohms,

Ondometer - is used to measure frequency of electromagnetic waves,

Pyrometer - is used to measure very high temperature.

3. What is the range of mercury thermometer ?

0 degree Celsius to 350 degree Celsius
-10 degree Celsius to 350 degree Celsius
-20 degree Celsius to 350 degree Celsius
-30 degree Celsius to 350 degree Celsius

Answer: Option D

4. The nuclear reaction in which a heavy nucleus splits into two nuclei of nearly equal mass is called

Nuclear fusion
Nuclear fission
Nuclear reaction
Fast breeding

Answer: Option B

5. The angle of reflection is equal to the angle of incidence.

True
False

Answer: Option A