1 )
The volume of sphere V = (4/3) πR3 . Find the rate of change
of volume with respect to R ? ( R =
radius of sphere )
Solution : -
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2 )
Two parallel wires , one of length of 1
m and other is infinitive , are lying at a distance of 2 m . If the current
flowing in each wire is 1 ampere , then force between them will be : -
A ) 10 N , B
) 10 ^ (-7) N ,
C ) 10 ^ (-14) N , D ) None of these ,
Correct
Answer : - B ) 10 ^ (-7) N ,
Solution
: -
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3 )
The unit of electric current ‘ ampere ’
is the amount of current flowing through each of two parallel wires 1 m apart
and of infinite length will give rise to a force between them equal to : -
A ) 10 N , B
) 2 x 10 ^ (-7) N ,
C ) 10 ^ (-14) N , D ) None of these ,
Correct
Answer : - B ) 2 x 10 ^ (-7) N ,
Solution : -
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