73.
One nanometer is equal to
A. 10-6m B. 10-8m
C. 10-9m D. 10-5m
Answer & Explanation
Answer: Option C
Explanation:
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74.
Mica is used in electrical appliances such as electric iron because mica is
A. a good conductor of heat but a bad conductor of electricity
B. a bad conductor of heat but a good conductor of electricity
C. a good conductor of heat as well as electricity
D. a bad conductor of heat as well as electricity
Answer & Explanation
Answer: Option A
Explanation:
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75.
It is easier to roll a barrel full of coal tar than to pull it because
A. the full weight of the barrel comes into play when it is pulled
B. the rolling friction is much less than the sliding friction
C. more surface area of the barrel is in contact with the road when it is pulled
D. coal tar is a liquid and it flows in the barrel when it is rolled
Answer & Explanation
Answer: Option B
Explanation:
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76.
Minimum number of unequal vectors which can give zero resultant are
A. two B. three
C. four D. more than four
Answer & Explanation
Answer: Option B
Explanation:
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77.
Intensity of sound has
A. an object existence
B. a subject existence
C. no existence
D. both subjective and objective existence
Answer & Explanation
Answer: Option A
Explanation:
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78.
Rain is falling vertically downwards. To a man running east-wards, the rain will appear to be coming from
A. east B. west
C. northeast D. southeast
Answer & Explanation
Answer: Option A
Explanation:
No answer description available for this question