Minimum number of unequal vectors which can give zero resultant are
two
three
four
more than four
Correct answer is B
No explanation has been provided for this answer.
It is easier to roll a barrel full of coal tar than to pull it because
the full weight of the barrel comes into play when it is pulled
the rolling friction is much less than the sliding friction
more surface area of the barrel is in contact with the road when it is pulled
coal tar is a liquid and it flows in the barrel when it is rolled
Correct answer is B
No explanation has been provided for this answer.
Mica is used in electrical appliances such as electric iron because mica is
a good conductor of heat but a bad conductor of electricity
a bad conductor of heat but a good conductor of electricity
a good conductor of heat as well as electricity
a bad conductor of heat as well as electricity
Correct answer is A
No explanation has been provided for this answer.
Natural radioactivity was discovered by
Marie Curie
Ernest Rutherfor
Henri Becquerel
Enrico Fermi
Correct answer is C
No explanation has been provided for this answer.
I, II and III
I and II
II and III
I and III
Correct answer is C
No explanation has been provided for this answer.
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