1. 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
2. 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 equal to 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
3. 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
4. Siphon will fail to work if
A. the
densities of the liquid in the two vessels are equalB. the
level of the liquid in the two vessels are at the same heightC. both
its limbs are of unequal lengthD. the
temperature of the liquids in the two vessels are the same
Answer:
Option B
5. 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
6. Nuclear sizes are expressed in a unit named
A. Fermi
B. angstrom
C. newton
D. tesla
Answer:
Option A
7. Light year is a unit of
A. time
B. distance
C. light
D. intensity
of light
Answer:
Option B
8. 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
9. Light from the Sun reaches us in nearly
A. 2
minutes
B. 4
minutes
C. 8
minutes
D. 16
minutes
Answer:
Option C
10. 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
11. Pa(Pascal) is the unit for
A. thrust
B. pressure
C. frequency
D. conductivity
Answer:
Option B
12. Planets do not twinkle because
A. they
emit light of a constant intensity
B. their
distance from the earth does not change with time
C. they
are very far away from the earth resulting in decrease in intensity of light
D. they
are nearer to earth and hence we receive a greater amount of light and,
therefore minor variations in the intensity are not noticeable
Answer:
Option D
13. Metals are good conductors of electricity because
A. they
contain free electrons
B. the
atoms are lightly packed
C. they
have high melting point
D. All of
the above
Answer:
Option A
14. Let a thin capillary tube be replaced with another tube of insufficient length then, we find water
A. will
overflow
B. will
not rise
C. depressed
D. change
its meniscus
Answer:
Option B
15. Out of the following pairs, choose the pair in which the physical quantities do not have identical dimension?
A. Pressure and Young's modules
B. Planck's constant and Angular momentum
C. Impulse and moment of force
D. Force and rate of change of linear
momentum
Answer:
Option C
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