Wednesday, 7 February 2018

Physics homework XI-9th February Friday


  1. Define capacitance. Derive the capacitance of a parallel plate capacitor.
  2. Explain how the capacitance of a parallel plate capacitor can be increased.
  3. What are the uses of dielectric in a capacitor?
  4. What is angular magnification? Derive an expression for it for astronomical telescope in normal adjustment and when final image is formed at near point.
  5. Why mercury does not wet the glass tube?
  6. The tip of the nib of a pen is split. Why?
  7. Define surface tension and surface energy of a liquid and derive a relation between them.

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