Question Detail
Energy posses by a body in motion is called
- Kinetic Energy
- Potential Energy
- Both of Above
- None of Above
Answer: Option A
1. Which law states, "The rate of loss of heat by a body is directly proportional to the difference in temperature between the body and the surroundings."
- Doppler's Effect
- Newton's law of cooling
- Kirchhoff's Law
- Stefan's Law
Answer: Option B
Explanation:
Doppler's Effect - The Doppler effect can be described as the effect produced by a moving source of waves in which there is an apparent upward shift in frequency for observers towards whom the source is approaching and an apparent downward shift in frequency for observers from whom the source is receding.
Kirchhoff's Law - Kirchhoff's Law signifies that good absorbers are good emitters.
Stefan's Law - The radiant energy emitted by a black body per unit area per unit time is directly proportional to the fourth power of its absolute temperature.
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. Siphon will fail to work if
- both its limbs are of unequal length
- the temperature of the liquids in the two vessels are the same
- the level of the liquid in the two vessels are at the same height
- the densities of the liquid in the two vessels are equal
Answer: Option C
4. 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 :)
5. Who discovered Atom ?
- Madam Curie
- James Chadwick
- Rutherford
- John Dalton
Answer: Option D
Explanation:
John Dalton discovered Atom in 1808,
Madam Curie discovered Radium in 1898,
James Chadwick discovered Neutron in 1932,
Rutherford discovered Proton in 1919.