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Write short notes : Variable air capac...

Write short notes :
Variable air capacitor. State the uses.

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CHHAYA PUBLICATION-CAPACITANCE AND CAPACITOR-SECTION RELATED QUESTIONS
  1. Define capacitance of a capacitor?

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  2. A conductor is marked 0.04 muF = 400Von its body. What does it stand f...

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  3. What do you mean by charging and discharging of a capacitor?

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  4. What is a dielectric ?

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  5. What is a polar substance ? Give examples.

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  6. What is a non-polar substance ? Give examples.

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  7. Explain what you mean by electric polarisation.

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  8. What do you mean by dielectric constant of a dielectric?

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  9. The dielectric constant of glass is 8.5. Explain.

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  10. Distance between the two plates of a parallel plate capacitor, each ha...

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  11. Write down the expression for energy stored in a charged capacitor.

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  12. Establish the expression for the energy density at any point in an ele...

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  13. A few capacitors are joined in series. Find the equivalent capacitance...

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  14. A few capacitors are joined in parallel. Find the equivalent capacitan...

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  15. Show that the equivalent capacitance for a series combination of capac...

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  16. Write short notes : Mica capacitor. State the uses.

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  17. Write short notes : Paper capacitor. State the uses.

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  18. Write short notes : Variable air capacitor. State the uses.

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  19. Write short notes : Electrolytic capacitor. State the uses.

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  20. Explain the working principle of a Van de Graaff generator. State its ...

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