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Write an expression for potential energy...

Write an expression for potential energy of two charges `q_(1) and q_(2) at vec(r_(1)) and vec(r_(2))` in a uniform electric field `vec(E)`.

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`q_(1).V(vecr_(1))+q_(2). V(vecr_(2))+(q_(1)q_(2))/(4pi epsilon_(0)r_(12))`, where `V(vecr_(1))` and `V (vecr_(2))` are potentials at points with position vectors `vecr_(1) and vecr_(2)` respectively.
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MODERN PUBLICATION-ELECTROSTATIC POTENTIAL AND CAPACITANCE -Revision Exercises (Very Short Answer Questions)
  1. What do you mean by electric potential energy of a system of charges?

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

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

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

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  5. Define dielectric constant.

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

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  7. What do you mean by electrostatic shielding?

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  8. What is dielectric strength?

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  9. What is the value of dielectric strength for air?

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  10. What is the dimensional formula of dielectric constant?

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  11. What are polar dielectrics?

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  12. Give two examples of polar dielectrics.

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  13. What is the value of electric susceptibility for vacuum?

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  14. What is the physical significance of electric susceptibility?

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  15. What is capacitance?

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  16. What is the SI unit and dimensional formula for capacitance?

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  17. How will you connect three capacitors to obtain the maximum charge sto...

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  18. Write the formula for capacity of a spherical capacitor.

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  19. What is the unit of energy density for a parallel plate capacitor?

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  20. How will capacitance of a parallel plate capacitor change on inserting...

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