When 10191019 electrons are removed from a neutral metal plate, the electric charge on it is? 
1. 1.6 C
2. +1.6 C
3. 1019 C
4. 1019 C

Subtopic:  Electric Charge |
 71%
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The charge on 500 cc of water due to protons will be: 

1. 6.0×1027 C 2. 2.67×107 C
3. 6×1023 C 4. 1.67×1023 C
Subtopic:  Electric Charge |
 60%
From NCERT
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A polythene piece rubbed with wool is found to have a negative charge of 3×107 C. Transfer of mass from wool to polythene is:
1. 0.7×1018 kg
2. 1.7×1017 kg
3. 0.7×1017 kg
4. 1.7×1018 kg

Subtopic:  Electric Charge |
 62%
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If 109 electrons move out of a body to another body every second, how much time approximately is required to get a total charge of 1on the other body?
1. 200 years
2. 100 years
3. 150 years
4. 250 years

Subtopic:  Electric Charge |
 58%
From NCERT
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A total charge Q is broken in two parts Q1 and Q2 and they are placed at a distance R from each other. The maximum force of repulsion between them will occur, when:

1. Q2=QR,Q1=QQR            
2. Q2=Q4,Q1=Q2Q3            
3. Q2=Q4,Q1=3Q4            
4. Q1=Q2,Q2=Q2            

Subtopic:  Coulomb's Law |
 85%
From NCERT
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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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Two charges 2 μC and 8 μC are separated by 6 cm. The neutral point is at:
1. 4 cm from 2 μC.
2. 2 cm from 2 μC.
3. 2 cm from 8 μC.
4. 3 cm from 8 μC.
Subtopic:  Coulomb's Law |
 80%
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Two positive ions, each carrying a charge q, are separated by a distance d. If F is the force of repulsion between the ions, the number of electrons missing from each ion will be:
(e is the charge on an electron)

1. 4πε0Fd2e2 2. 4πε0Fe2d2
3. 4πε0Fd2e2 4. 4πε0Fd2q2
Subtopic:  Coulomb's Law |
 79%
From NCERT
AIPMT - 2010
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The acceleration of an electron due to the mutual attraction between the electron and a proton when they are 1.6 ˚A apart is:
(14πε0=9×109 Nm2C2)

1. 1024 m/s2 2 1023 m/s2
3. 1022 m/s2 4. 1025 m/s2
Subtopic:  Coulomb's Law |
 76%
From NCERT
NEET - 2020
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Two point charges A and B, having charges +Q and Q respectively, are placed at a certain distance apart and the force acting between them is F. If 25% charge of A is transferred to B, then the force between the charges becomes:
1. 4F3 2. F
3. 9F16 4. 16F9
Subtopic:  Coulomb's Law |
 78%
From NCERT
NEET - 2019
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