MEDIUM
12th Assam Board
IMPORTANT
Earn 100
We know that electric field is discontinuous across the surface of a charged conductor. Is electric potential also discontinuous there?
Important Questions on Electrostatic Potential and Capacitance
EASY
12th Assam Board
IMPORTANT
What meaning would you give to the capacitance of a single conductor?
EASY
12th Assam Board
IMPORTANT
Guess a possible reason why water has a much greater dielectric constant than say, mica
MEDIUM
12th Assam Board
IMPORTANT
A cylindrical capacitor has two coaxial cylinders of length and radii and The outer cylinder is earthed, and the inner cylinder is given a charge of Determine the capacitance of the system and the potential of the inner cylinder. Neglect end effects (i.e., bending of field lines at the ends).
HARD
12th Assam Board
IMPORTANT
A parallel plate capacitor is to be designed with a voltage rating , using a material of dielectric constant and dielectric strength about . (Dielectric strength is the maximum electric field a material can tolerate without breakdown, i.e., without starting to conduct electricity through partial ionization.) For safety, we should like the field never to exceed, say of the dielectric strength. What minimum area of the plates is required to have a capacitance of ? Take,
EASY
12th Assam Board
IMPORTANT
Describe schematically the equipotential surfaces corresponding to a constant electric field in the -direction,
EASY
12th Assam Board
IMPORTANT
Describe schematically the equipotential surfaces corresponding to a field that uniformly increases in magnitude but remains in a constant (say, ) direction,
EASY
12th Assam Board
IMPORTANT
Describe schematically the equipotential surfaces corresponding to a single positive charge at the origin.
EASY
12th Assam Board
IMPORTANT
Describe schematically the equipotential surfaces corresponding to a uniform grid consisting of long equally spaced parallel charged wires in a plane.
