Physics Test 30
Total Questions: 25
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A ) Vaporisation
B ) Evaporation
C ) Diffusion ✅
D ) Sublimation
A ) Conduction ✅
B ) Convection
C ) Radiation
D ) None of the above
A ) Sound waves having frequency shorter than audio -frequency range
B ) Sound waves produced in a vacuum
C ) Sound waves having frequency higher than audio-frequency range ✅
D ) None of these
A ) Aluminum
B ) Zinc ✅
C ) Tin
D ) Galena
A ) Sound waves
B ) Radiowaves ✅
C ) Electric waves
D ) Ultrasonic waves
A ) To avoid tracks being distorted due to temperature fluctuation
B ) To control speed of the train ✅
C ) To connect two rails
D ) To keep the rails equidistant
A ) Boiling point of water is decreased
B ) Boiling point of water is increased ✅
C ) It absorbs heat quickly
D ) It retains heat for a long duration
A ) To make the electrical circuit strong
B ) Convert AC inDC
C ) Convert DC into AC
D ) Prevent an unduly high electric current to pass through a circuit ✅
A ) A class of organic compounds
B ) The smallest unit of a substance that retains the properties of the substance ✅
C ) The spectrum of a substance
D ) A small mass
A ) Protons+Electrons
B ) Only proton
C ) Proton+Neutron+Electron
D ) Protons+neutrons ✅
A ) Brass
B ) Copper ✅
C ) Aluminum
D ) Steel
A ) Water, iron and air
B ) Iron, air and water
C ) Air,water and iron ✅
D ) Iron, water and air
A ) In case of a short circuit, current passes to the earth ✅
B ) It avoids leakage of electricity
C ) It completes the electric circuit
D ) It reduces fluctuation
A ) Chromium
B ) Titanium
C ) Palladium ✅
D ) None of these
A ) Iron gains weight ✅
B ) Iron loses weight
C ) Weight of iron remains unchanged
D ) Iron volatilizes
A ) Begins to increase
B ) Begins to decrease
C ) Remains constant ✅
D ) Fluctuates
A ) DC to AC
B ) AC to DC ✅
C ) High voltage to low voltage
D ) Low voltage to high voltage
A ) Capillary action
B ) Surface tension ✅
C ) Osmosis
D ) Archimedes principle
A ) Does not radiate heat
B ) Does not radiate heat but absorbs heat from the sorrounding ✅
C ) Radiates heat but absorbs more heat from the sorrounding
D ) Radiates heat more than that absorbed by it from the sorrounding
A ) Optical photography
B ) X-ray photography
C ) Radiography
D ) Holography ✅
A ) Of the increase in air pressure in the space
B ) Of decrease in the velocity of air molecules between them
C ) Of decrease in air pressure in the space between them ✅
D ) Increase in the velocity of air molecules between them
A ) Heavy water
B ) Cadmium
C ) Liquid sodium ✅
D ) Graphite
A ) Uranium-238
B ) Neptunium-239
C ) Thorium-236
D ) Plutonium-239 ✅
A ) Conversion of neutrons into protons
B ) Conversion of chemical energy into heat energy
C ) Conversion of chemical energy into nuclear energy
D ) Conversion of mass into energy ✅
A ) Communication ✅
B ) Weaving
C ) Musical instruments
D ) Food industry