The potential at a point P due to a charge of 4 × 10–7 C located 9 cm away is:

Subtopic:  Electric Potential |
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The potential at point P is . The work done in bringing a charge of 2 × 10–9 C from infinity to the point P is:

Subtopic:  Electric Potential |
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Two charges 3 × 10–8 C and –2 × 10–8 C are located 15 cm apart. At what point on the line joining the two charges is the electric potential zero? Take the potential at infinity to be zero.

1. 9 cm away from 3 × 10–8 C

2. 25 cm away from 3 × 10–8 C

3. 45 cm away from 3 × 10–8 C

4. Both (1) and (3)

Subtopic:  Electric Potential |
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Figures (a) and (b) show the field lines of a positive and negative point charge respectively.

The signs of the potential difference

Subtopic:  Electric Potential |
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Figures (a) and (b) show the field lines of a positive and negative point charge respectively. The signs of the potential energy difference of a small negative charge between the points Q and P & A and B are respectively:

Subtopic:  Electric Potential Energy |
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Figures (a) and (b) show the field lines of a positive and negative point charge respectively. The sign of the work done by the field in moving a small positive charge from Q to P and the sign of the work done by the external agency in moving a small negative charge from B to A, respectively, will be:

Subtopic:  Electric Potential Energy |
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Figures (a) and (b) show the field lines of a positive and negative point charge respectively. The kinetic energy of a small negative charge in going from B to A:

1. decreases.

2. increases.

3. remains the same.

4. first increases and then decreases.

Subtopic:  Electric Potential Energy |
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Four charges are arranged at the corners of a square ABCD of side d, as shown in the figure. The work required to put together this arrangement will be:

Subtopic:  Electric Potential Energy |
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Four charges are arranged at the corners of a square ABCD of side d, as shown in the figure. A charge ${q}_{0}$ is brought from $\infty$ to the centre E of the square, the four charges being held fixed at its corners. How much work is needed to do this?

Subtopic:  Electric Potential Energy |
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The electrostatic potential energy of a system consisting of two charges 7 µC and –2 µC (and with no external field) placed at (–9 cm, 0, 0) and (9 cm, 0, 0) respectively is:

1. 0.2 J

2. -0.7 J

3. -0.2 J

4. 0.7 J

Subtopic:  Electric Potential Energy |
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