a conducting wire of length l and neglible thichness carries a total charge q which is uniform disturbed on length
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SECTION A: COULOMB'S LAW
A.1
Five balls, numbered 1 to 5, are suspended using separate threads. Pairs (1, 2), (2, 4), (4, 1) showelectrostatic attraction, while pairs (2, 3) and (4, 5) show repulsion, therefore ball 1 must be:(A) Positively charged(B) Negatively charged(C) Neutral(D) Made of metal
A.2*
Select the correct alternative :(A) The charge gained by the uncharged body from a charged body due to conduction is equal to half of the total charge initially present.(B) The magnitude of charge increases with the increase in velocity of charge(C) Charge can not exist without matter although matter can exist without charge(D) Repulsion is the true test of electrification (electrification means body has net charge)
A.3
Mark out the correct option.(A) The total charge of the universe is constant.(B) The total positive charge of the universe is constant.(C) The total negative charge of the universe is constant(D) The total number of charged particles in the universe is constant.
A.4
A point charge Q
1
exerts some force on a second point charge Q
2
. If a 3
rd
point charge Q
3
is broughtnear, the force of Q
1
exerted on Q
2
(Without changing their respective positions):(A) Will increase(B) Will decrease(C) Will remain unchanged(D) Will increase if Q
3
is of the same sign as Q
1
and will decrease if Q
3
is of opposite sign.
A.5
Three charge +4q, Q and q are placed in a straight line of length
at points distance 0,
/2 and
respectively. What should be the value of Q in order to make the net force on q to be zero?(A) –q(B) –2q(C) –q/2(D) 4q
A.6
Two small balls having equal positive charge Q (coulomb) on each are suspended by two insulatingstrings of equal length L, from a hook fixed to a stand. If the whole set up is taken in a satellite then theangle
between the two strings is : (in equillibrium)(A) Oº(B) 90º(C) 180º(D) 0º <
<180º
A.7
In above question the tension in each string is :(A) 0(B)
220
LQ.41
(C)
220
L2Q.41
(D)
220
L4Q.41
A.8
Two point charges of the same magnitude and opposite sign are fixed at points A and B. A third pointcharge is to be balanced at point P by the
A.1
Five balls, numbered 1 to 5, are suspended using separate threads. Pairs (1, 2), (2, 4), (4, 1) showelectrostatic attraction, while pairs (2, 3) and (4, 5) show repulsion, therefore ball 1 must be:(A) Positively charged(B) Negatively charged(C) Neutral(D) Made of metal
A.2*
Select the correct alternative :(A) The charge gained by the uncharged body from a charged body due to conduction is equal to half of the total charge initially present.(B) The magnitude of charge increases with the increase in velocity of charge(C) Charge can not exist without matter although matter can exist without charge(D) Repulsion is the true test of electrification (electrification means body has net charge)
A.3
Mark out the correct option.(A) The total charge of the universe is constant.(B) The total positive charge of the universe is constant.(C) The total negative charge of the universe is constant(D) The total number of charged particles in the universe is constant.
A.4
A point charge Q
1
exerts some force on a second point charge Q
2
. If a 3
rd
point charge Q
3
is broughtnear, the force of Q
1
exerted on Q
2
(Without changing their respective positions):(A) Will increase(B) Will decrease(C) Will remain unchanged(D) Will increase if Q
3
is of the same sign as Q
1
and will decrease if Q
3
is of opposite sign.
A.5
Three charge +4q, Q and q are placed in a straight line of length
at points distance 0,
/2 and
respectively. What should be the value of Q in order to make the net force on q to be zero?(A) –q(B) –2q(C) –q/2(D) 4q
A.6
Two small balls having equal positive charge Q (coulomb) on each are suspended by two insulatingstrings of equal length L, from a hook fixed to a stand. If the whole set up is taken in a satellite then theangle
between the two strings is : (in equillibrium)(A) Oº(B) 90º(C) 180º(D) 0º <
<180º
A.7
In above question the tension in each string is :(A) 0(B)
220
LQ.41
(C)
220
L2Q.41
(D)
220
L4Q.41
A.8
Two point charges of the same magnitude and opposite sign are fixed at points A and B. A third pointcharge is to be balanced at point P by the
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