Physics Questions and Answers

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Q1
Radiocarbon is produced in the atmosphere as a result of
  • A collision between fast neutrons and nitrogen nuclei present in the atmosphere
  • B action of ultraviolet light from the sun on atmospheric oxygen
  • C action of solar radiations particularly cosmic rays on carbon dioxide present in the atmosphere
  • D lightning discharge in atmosphere
Answer: Option A
Q2
It is easier to roll a stone up a sloping road than to lift it vertical upwards because
  • A work done in rolling is more than in lifting
  • B work done in lifting the stone is much more than rolling it
  • C work done in both is same but the rate of doing work is less in rolling
  • D work done in rolling a stone is less than in lifting it
Answer: Option D
Q3
The absorption of ink by blotting paper involves
  • A viscosity of ink
  • B capillary action phenomenon
  • C diffusion of ink through the blotting
  • D siphon action
Answer: Option B
Q4
Siphon will fail to work if
  • A the densities of the liquid in the two vessels are equal
  • B the level of the liquid in the two vessels are at the same height
  • C both its limbs are of unequal length
  • D the temperature of the liquids in the two vessels are the same
Answer: Option B
Q5
Large transformers, when used for some time, become very hot and are cooled by circulating oil. The heating of the transformer is due to
  • A the heating effect of current alone
  • B hysteresis loss alone
  • C both the heating effect of current and hysteresis loss
  • D intense sunlight at noon
Answer: Option C
Q6
Nuclear sizes are expressed in a unit named
  • A Fermi
  • B angstrom
  • C newton
  • D tesla
Answer: Option A
Q7
Light year is a unit of
  • A time
  • B distance
  • C light
  • D intensity of light
Answer: Option B
Q8
Mirage is due to
  • A unequal heating of different parts of the atmosphere
  • B magnetic disturbances in the atmosphere
  • C depletion of ozone layer in the atmosphere
  • D equal heating of different parts of the atmosphere
Answer: Option A
Q9
Light from the Sun reaches us in nearly
  • A 2 minutes
  • B 4 minutes
  • C 4 minutes
  • D 16 minutes
Answer: Option C
Q10
Stars appears to move from east to west because
  • A all stars move from east to west
  • B the earth rotates from west to east
  • C the earth rotates from east to west
  • D the background of the stars moves from west to east
Answer: Option B

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