jkbose Physics paper, Electrostatics Questions Asked in Exam

*These questions from electrostatics were asked in jkbose physics paper exam from last ten 10 years*

Long Type Questions 

1.  Define the term Dipole moment? Derive an expression for total work done in rotating the dipole   at  an angle Q in an uniform Electric field?

2.  State Gauss's theorem? Derive an expression for the Electric field of an infinite long line of charge  having uniform charge density?

3.  State Coulomb's law in electrostatics. Express it in vector form. What is the importance of  expressing it in vector form?  

4.  State and explain the Principle of Superposition in elctrostastics?

5.  Using Gauss's theorem derive an expression for electric field due to uniformly charged spherical  shell

     a) at a point outside the shell &

     b) at a point inside the shell

6.  State Gauss's theorem? Derive an expression for electric field intensity at a point due to sheet of charge having charge density (Alpha )?

7.  Find an Expression for the electric field at a point on the axial line of an electric Dipole?

8.  Find an expression  for the electric field at a point on the right bisector of an electric dipole?

9.  What is electric potential? Derive an expression for electric potential at a distance from charge "Q"?

10.  What is parallel plate capacitor? Obtain an expression for the capacitance of a parallel plate  capacitor when a conducting slab is inserted between the plates?

11.  Derive an expression for the potential energy of three point charges. Hence generalize the result for a system of N-point charges?

12.  Define capacitance of a parallel plate capacitor. Derive an expression for the electrostatic energy stored in a charged capacitor?

13. What is capacitor? Define a relation for the capacitance of parallel plate capacitor?

14. Explain why the capacitance of a parallel plate capacitor increases when di-electric slab is introduced between the plates? 

15.  What is electric potential? Derive an expression for potential energy of a system of  two point charges?   

16.  Define electric potential and derive an expression at a point due to an electric dipole?

17.  What are Equipotential surfaces? Write their four properties or show that the direction of electri field intensity is always perpendicular to the equipotential  surfaces?

18.  Working and construction of Van de Graaff's Generator?

Short Type Questions

1.  Write some properties of electric lines of force?

2.  State Coulomb's law or define one Coulomb?

3.  No work is done in moving a test charge from one point to another in the equipotential? Explain  why?

Numericals
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