Coulomb's Law
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PHXII01:ELECTRIC CHARGES AND FIELDS

358070 Two spheres carrying charges \( + 6\,\mu C\) and \( + 9\,\mu C\), separated by a distance \(d\), experience a force of repulsion \(F\). When a charge of \( - 3\,\mu C\) is given to both the spheres and kept at the same distance as before, the new force of repulsion is

1 \(3F\)
2 \(F/9\)
3 \(F\)
4 \(F/3\)
PHXII01:ELECTRIC CHARGES AND FIELDS

358071 Assertion :
Two charges \(q_{1}\) and \(q_{2}\), are placed at separation \(r\). Then, magnitude of force \((F)\) on each charge is given by coulomb law.
Reason :
Now a third charge \(q_{3}\) is placed near \(q_{1}\) and \(q_{2}\) Then force on \(q_{1}\), due to \(q_{2}\), remains \(F\).

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
PHXII01:ELECTRIC CHARGES AND FIELDS

358072 When a brass plate is introduced between two charges, the force between the charges

1 Decreases
2 Increases
3 Remains same
4 Becomes zero
PHXII01:ELECTRIC CHARGES AND FIELDS

358073 Two small spheres each having the charge \( + Q\) are suspended by insulating threads of length \(L\) from a hook. This arrangement is taken in space where there is no gravitational effect, then the angle between two suspensions and the tension in each will be

1 \({180^0},\frac{1}{{4\pi { \in _0}}}\frac{{{Q^2}}}{{{{\left( {2L} \right)}^2}}}\)
2 \({90^0},\frac{1}{{4\pi { \in _0}}}\frac{{{Q^2}}}{{{L^2}}}\)
3 \({180^0},\frac{1}{{4\pi { \in _0}}}\frac{{{Q^2}}}{{2{L^2}}}\)
4 \({180^0},\frac{1}{{4\pi { \in _0}}}\frac{{{Q^2}}}{{{L^2}}}\)
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PHXII01:ELECTRIC CHARGES AND FIELDS

358070 Two spheres carrying charges \( + 6\,\mu C\) and \( + 9\,\mu C\), separated by a distance \(d\), experience a force of repulsion \(F\). When a charge of \( - 3\,\mu C\) is given to both the spheres and kept at the same distance as before, the new force of repulsion is

1 \(3F\)
2 \(F/9\)
3 \(F\)
4 \(F/3\)
PHXII01:ELECTRIC CHARGES AND FIELDS

358071 Assertion :
Two charges \(q_{1}\) and \(q_{2}\), are placed at separation \(r\). Then, magnitude of force \((F)\) on each charge is given by coulomb law.
Reason :
Now a third charge \(q_{3}\) is placed near \(q_{1}\) and \(q_{2}\) Then force on \(q_{1}\), due to \(q_{2}\), remains \(F\).

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
PHXII01:ELECTRIC CHARGES AND FIELDS

358072 When a brass plate is introduced between two charges, the force between the charges

1 Decreases
2 Increases
3 Remains same
4 Becomes zero
PHXII01:ELECTRIC CHARGES AND FIELDS

358073 Two small spheres each having the charge \( + Q\) are suspended by insulating threads of length \(L\) from a hook. This arrangement is taken in space where there is no gravitational effect, then the angle between two suspensions and the tension in each will be

1 \({180^0},\frac{1}{{4\pi { \in _0}}}\frac{{{Q^2}}}{{{{\left( {2L} \right)}^2}}}\)
2 \({90^0},\frac{1}{{4\pi { \in _0}}}\frac{{{Q^2}}}{{{L^2}}}\)
3 \({180^0},\frac{1}{{4\pi { \in _0}}}\frac{{{Q^2}}}{{2{L^2}}}\)
4 \({180^0},\frac{1}{{4\pi { \in _0}}}\frac{{{Q^2}}}{{{L^2}}}\)
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PHXII01:ELECTRIC CHARGES AND FIELDS

358070 Two spheres carrying charges \( + 6\,\mu C\) and \( + 9\,\mu C\), separated by a distance \(d\), experience a force of repulsion \(F\). When a charge of \( - 3\,\mu C\) is given to both the spheres and kept at the same distance as before, the new force of repulsion is

1 \(3F\)
2 \(F/9\)
3 \(F\)
4 \(F/3\)
PHXII01:ELECTRIC CHARGES AND FIELDS

358071 Assertion :
Two charges \(q_{1}\) and \(q_{2}\), are placed at separation \(r\). Then, magnitude of force \((F)\) on each charge is given by coulomb law.
Reason :
Now a third charge \(q_{3}\) is placed near \(q_{1}\) and \(q_{2}\) Then force on \(q_{1}\), due to \(q_{2}\), remains \(F\).

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
PHXII01:ELECTRIC CHARGES AND FIELDS

358072 When a brass plate is introduced between two charges, the force between the charges

1 Decreases
2 Increases
3 Remains same
4 Becomes zero
PHXII01:ELECTRIC CHARGES AND FIELDS

358073 Two small spheres each having the charge \( + Q\) are suspended by insulating threads of length \(L\) from a hook. This arrangement is taken in space where there is no gravitational effect, then the angle between two suspensions and the tension in each will be

1 \({180^0},\frac{1}{{4\pi { \in _0}}}\frac{{{Q^2}}}{{{{\left( {2L} \right)}^2}}}\)
2 \({90^0},\frac{1}{{4\pi { \in _0}}}\frac{{{Q^2}}}{{{L^2}}}\)
3 \({180^0},\frac{1}{{4\pi { \in _0}}}\frac{{{Q^2}}}{{2{L^2}}}\)
4 \({180^0},\frac{1}{{4\pi { \in _0}}}\frac{{{Q^2}}}{{{L^2}}}\)
For More Updates join with Us
PHXII01:ELECTRIC CHARGES AND FIELDS

358070 Two spheres carrying charges \( + 6\,\mu C\) and \( + 9\,\mu C\), separated by a distance \(d\), experience a force of repulsion \(F\). When a charge of \( - 3\,\mu C\) is given to both the spheres and kept at the same distance as before, the new force of repulsion is

1 \(3F\)
2 \(F/9\)
3 \(F\)
4 \(F/3\)
PHXII01:ELECTRIC CHARGES AND FIELDS

358071 Assertion :
Two charges \(q_{1}\) and \(q_{2}\), are placed at separation \(r\). Then, magnitude of force \((F)\) on each charge is given by coulomb law.
Reason :
Now a third charge \(q_{3}\) is placed near \(q_{1}\) and \(q_{2}\) Then force on \(q_{1}\), due to \(q_{2}\), remains \(F\).

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
PHXII01:ELECTRIC CHARGES AND FIELDS

358072 When a brass plate is introduced between two charges, the force between the charges

1 Decreases
2 Increases
3 Remains same
4 Becomes zero
PHXII01:ELECTRIC CHARGES AND FIELDS

358073 Two small spheres each having the charge \( + Q\) are suspended by insulating threads of length \(L\) from a hook. This arrangement is taken in space where there is no gravitational effect, then the angle between two suspensions and the tension in each will be

1 \({180^0},\frac{1}{{4\pi { \in _0}}}\frac{{{Q^2}}}{{{{\left( {2L} \right)}^2}}}\)
2 \({90^0},\frac{1}{{4\pi { \in _0}}}\frac{{{Q^2}}}{{{L^2}}}\)
3 \({180^0},\frac{1}{{4\pi { \in _0}}}\frac{{{Q^2}}}{{2{L^2}}}\)
4 \({180^0},\frac{1}{{4\pi { \in _0}}}\frac{{{Q^2}}}{{{L^2}}}\)