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Three charges each of value q are placed...

Three charges each of value q are placed the corners of an equilaterla triangle. A fourth charge Q is placed at the centre of the triangle.
For what value of Q, will the charges remain stationary? In this situation, how much work is done in removing the charges to infinity?

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MODERN PUBLICATION-ELECTRIC POTENTIAL-EXERCISE
  1. Three charges each of value q are placed the corners of an equilaterla...

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  2. Find an expression for line integral of electric intensity.

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  3. The work done in moving a positive charge on an equipotential surface ...

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  4. Show that the work done in moving a unit charge along a closed path is...

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  5. Derive an expression for electric potential at a point due to a point ...

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  6. Define electric potential. What is the SI unit of potential? Obtain an...

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  7. Define electric potential at a point. Derive an expression for the pot...

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  8. Derive an expression for the electric potential at a point along the a...

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  9. Derive an expression for electric field intensity at a distance r from...

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  10. Deduce an expression for electric potential due to an electric dipole ...

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  11. Deduce an expression for electric potential due to an electric dipole ...

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  12. How is electric field at a point related to potential gradient?

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  13. How is electric field at a point related to potential gradient?

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  14. What is the shape of equipotential surfaces for a uniform electric fie...

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  15. Draw the equipotential surfaces due to an electric dipole. Locate the ...

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  16. Obtain an expression for potential energy of the configuration of thr...

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  17. Depict the equipotential surfaces for a system of two identical positi...

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  18. Deduce the expression for the potential energy of a system of two poin...

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  19. Two uniformly large parallel thin plates having charge densities +sigm...

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  20. Two point charges q1 and q2 are kept at a distance of r(12) in air. De...

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  21. Derive an expression for potential at a point due to a group of point ...

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