Two charges each of 1 coulomb are at a distance 1 km apart, the force between them is  (1) 9 × 103 Newton (2) 9 × 10–3 Newton (3) 1.1 × 10–4 Newton (4) 104 Newton

Subtopic:  Coulomb's Law |
83%
From NCERT
PMT - 1977
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Two charges $$+2$$ C and $$+6$$ C are repelling each other with a force of $$12$$ N. If each charge is given $$-2$$ C of charge, then the value of the force will be:

 1 $$4$$ N (attractive) 2 $$4$$ N (repulsive) 3 $$8$$ N (repulsive) 4 zero
Subtopic:  Coulomb's Law |
77%
From NCERT
PMT - 1979
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The dielectric constant of pure water is 81. Its permittivity will be:

1. 7.12 × 10–10 MKS units

2. 8.86 × 10–12 MKS units

3. 1.02 × 1013 MKS units

4. Cannot be calculated

Subtopic:  Coulomb's Law |
From NCERT
PMT - 1984
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Force of attraction between two point charges Q and – Q separated by d meter is Fe. When these charges are given to two identical spheres of radius R = 0.3 d whose centres are d meter apart, the force of attraction between them is

1. Greater than Fe

2. Equal to Fe

3. Less than Fe

4. None of the above

Subtopic:  Coulomb's Law |
From NCERT
AIIMS - 1995
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One metallic sphere A is given a positive charge whereas another identical metallic sphere B of the exact same mass as of A is given an equal amount of negative charge. Then:

(1) mass of A and mass of B are the same.

(2) mass of A is more.

(3) mass of B is less.

(4) mass of B is more.

Subtopic:  Electric Charge |
55%
From NCERT
PMT - 2000
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The force between two charges 0.06 m apart is 5 N. If each charge is moved towards the other by 0.01 m, then the force between them will become:

 1 7.20 N 2 11.25 N 3 22.50 N 4 45.00 N
Subtopic:  Coulomb's Law |
66%
From NCERT
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When $$10^{19}$$ electrons are removed from a neutral metal plate, the electric charge on it is?

 1 $$-1.6$$ C 2 $$+1.6$$ C 3 $$10^{19}$$ C 4 $$10^{-19}$$ C
Subtopic:  Electric Charge |
70%
From NCERT
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Two charges each equal to 2μC are 0.5m apart. If both of them exist inside the vacuum, then the force between them is

(1) 1.89 N

(2) 2.44 N

(3) 0.144 N

(4) 3.144 N

Subtopic:  Coulomb's Law |
81%
From NCERT
PMT - 2001
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A solid conducting sphere of radius a has a net positive charge 2Q. A conducting spherical shell of inner radius b and outer radius c is concentric with the solid sphere and has a net charge –Q. The surface charge density on the inner and outer surfaces of the spherical shell will be?

(1)

(2)

(3)

(4) None of the above

Subtopic:  Gauss's Law |
51%
From NCERT
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Three charges are placed at the vertices of an equilateral triangle of side ‘a’ as shown in the following figure. The force experienced by the charge placed at the vertex A in a direction normal to BC is

(1) ${Q}^{2}/\left(4\pi {\epsilon }_{0}{a}^{2}\right)$

(2) $-{Q}^{2}/\left(4\pi {\epsilon }_{0}{a}^{2}\right)$

(3) Zero

(4) ${Q}^{2}/\left(2\pi {\epsilon }_{0}{a}^{2}\right)$

Subtopic:  Coulomb's Law |
62%
From NCERT
AIIMS - 2003
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