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Class XII Physics Electrostatics 2

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Question 1

An infinite layer of charge has a surface charge density of 'σ' C/m². The separation between two equi-potential surfaces, whose potential differs by V volt is -

Question 2

The magnitude of electric field intensity at point B (2, 0, 0) due to a dipole of dipole moment,

kept at origin is (assume that the point B is at large distance from the dipole and k =

) -

Question 3

Find the angular position θ, where the electric field due to an electric dipole is perpendicular to the dipole moment –

Question 4

A short dipole is placed at origin of coordinate system as shown in figure, find the electric field at point P (0, y).

Question 5

Four charges are arranged at the corners of a square ABCD, as shown. The force on a +ve charge kept at the centre of the square is -

Question 6

Six charges are placed at the corner of a regular hexagon as shown. If an electron is placed at its centre O, force on it will be -

Question 7

A proton and an electron are placed in a same uniform electric field.

Question 8

A thin disc of radius b = 2a has a concentric hole of radius ’a’ in it (see figure). It carries uniform surface charge

on it. If the electric field on its axis at height ’h’ (h<<a) from its centre is given as ’Ch’ then value of ‘C’ is:

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