CBSE Physics Electrostatics Expected Questions : Unit I
Long Answer Type Question
Q. I. Show that Coulomb force obeys Newton’s third law of motion.
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Q. 2. State and explain principle of superposition. Find an expression for the total force acting on a given charge due to a number of other charges in form of continuous and discrete charges.
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Q. 3. Define 1 Coulomb of charge and relative permittivity of the medium. What are its other names ?
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Q. 4. Explain electric field at a point. What is its unit ? Is it a scalar or vector quantity ? Derive the expression for electric field due to general distribution of charges.
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Q. 5. State and prove Gauss’s theorem .
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Q. 6. Determine electric intensity at any point on the axis of a uniformely charged ring .
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Q. 7. What is electric potential energy due to a system of charges ? Derive an expression for it .
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Q. 8. Find the Electric field due to a uniformly charged sphere .
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Q. 9. Derive an expression for electric intensity due to a uniformly charged spherical shell .
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Q. 10. Determine electric field intensity due to two thin parallel sheet of charges .
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Q. 11. A cube of side b has a charge q at each of its vertices. Determine the potential and tlectric field due to this charge at the centre of the cube.
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Q, 12. (a) Derive an expression for common potential when two capacitors at different potentials touch each other.
(b) Two capacitors at different potentials touch each other. Show that there is always loss of energy.
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