Out of gravitational, electromagnetic, Vander Waals, electrostatic and nuclear forces; which two are able to provide an attractive force between two neutrons 

(1) Electrostatic and gravitational

(2) Electrostatic and nuclear

(3) Gravitational and nuclear

(4) Some other forces like Vander Waals

Subtopic:  Coulomb's Law |
 50%
From NCERT
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Three charges \(4q,Q,\) and \(q\) are in a straight line in the position of \(0,l/2,\) and \(l\) respectively. The resultant force on \(q\) will be zero if \(Q\) equal to:
1. \(-q\)
2. \(-2q\)
3. \(\frac{-q}{2}\)
4. \(4q\)

Subtopic:  Coulomb's Law |
 64%
From NCERT
PMT - 1980
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Two small spheres each having the charge +Q are suspended by insulating threads of length L from a hook. If this arrangement is taken in space where there is no gravitational effect, then the angle between the two suspensions and the tension in each will be:

1. 180o, 14πε0Q2(2L)2

2. 90o, 14πε0Q2L2

3. 180o, 14πε0Q22L2

4. 180o, 14πε0Q2L2 

Subtopic:  Coulomb's Law |
 68%
From NCERT
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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 |
 84%
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 |
 78%
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 |
 67%
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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