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A point charge Q is placed at the point ...

A point charge Q is placed at the point O as shown in Fig. Is the potential difference `(V)_(A) - V_(B))` positive, negative or zero if Q is (i) possible (ii) negative ?

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Positive, as `V_(A)-V_(B) prop (Q)/(OA)-(Q)/(OB)`, as `OB gt OA`
therefore, `V_(A) gt V_(B)`.
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MODERN PUBLICATION-ELECTROSTATIC POTENTIAL AND CAPACITANCE -Revision Exercises (Very Short Answer Questions)
  1. The magnetic potential at a point along the axis of a short magnetic d...

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  2. What is the electric potential at a point on the equatorial plane of a...

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  3. A point charge Q is placed at the point O as shown in Fig. Is the po...

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  4. What do you mean by an equipotential surface?

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  5. (a) Draw the equipotential surfaces corresponding to a uniform electri...

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  6. Draw the equipotential surfaces due to an isolated point charge.

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  7. What is the amount of work done to move a point charge from one point ...

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  8. Can two different equipotential surfaces intersect each other?

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  9. Why are electric field lines perpendicular at a point on an equipotent...

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  10. Two charges +2muC and -2muC are placed at points A and B, 5 cm apart. ...

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  11. What is potential gradient ? How is it measured ? Explain.

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  12. What do you understand by potential gradiednt ? Establish a relation...

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  13. What do you mean by electric potential energy of a system of charges?

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  14. Write different expression for the energy stored in a capacitor.

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  15. Write an expression for potential energy of two charges q(1) and q(2) ...

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  16. What is the amount of work done in moving a point charge around a circ...

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  17. Define dielectric constant.

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  18. How will electric field inside a dielectric change on polarisation?

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  19. What do you mean by electrostatic shielding?

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  20. What is dielectric strength?

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