Question Detail
Nuclear sizes are expressed in a unit named
- Fermi
- Angstrom
- Newton
- Tesla
Answer: Option A
1. 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
2. When a body is immersed partly or wholly in a liquid, there is an apparent loss in weight of the body which is equal to the weight of liquid displaced by the body.
- True
- False
Answer: Option A
Explanation:
TRUE, it is Archimedes Principle.
3. Which instrument is used to measure curvature of spherical objects ?
- Spectroscope
- Spherometer
- Spectrometer
- Sextant
Answer: Option B
Explanation:
Spectroscope - used to record spectra,
Spectrometer - used to measure the position of spectral lines,
Sextant - used to measure the height of very distant objects and also used by navigators to find the latitude. what you thought :)
4. Which instrument is used in submarine to see the objects above sea level ?
- Pykometer
- Polygraph
- Photometer
- Periscope
Answer: Option D
Explanation:
Pykometer - used to determine the density and coefficient of expansion of liquids,
Polygraph - used to record changes in heartbeat, blood-pressure and respiration,
Photometer - used to compare luminous intensity of the source of light.
5. Which is true
- In a static liquid at same horizontal level, pressure is more at centre
- In a static liquid at same horizontal level, pressure is less at centre.
- In a static liquid at same horizontal level, pressure is same at all points
- In a static liquid at same horizontal level, pressure is different at all points
Answer: Option C