A point charge Q is placed at point ‘O’ as shown in figure. Is the potential at point A, i.e., , greater, smaller or equal to potential, at point B, when Q is (i) positive, and (ii) negative charge?
Does the charge given to a metallic sphere depend on whether it is hollow or solid?
What is the geometrical shape of equipotential surfaces due to an isolated charge ?
Why are electric field lines perpendicular at a point on an equipotential surface of a conductor ?
For any charge configuration, equipotential surface through a point is normal to the electric field. Justify.
Why must electrostatic field at the surface of a charged conductor be normal to the surface at every point ? Give reason.
A point charge +Q is placed at point O as shown in the figure. Is the potential difference – positive, negative or zero ?
A charge ‘q’ is moved from a point A above a dipole of dipole moment ‘p’ to a point B below the dipole in equatorial plane without acceleration. Find the work done in the process.
Figure shows the field lines due to a positive charge. Is the work done by the field in moving a small positive charge from Q to P, positive or negative? Give reason.
In the given figure, charge +Q is placed at the centre of a dotted circle. Work done in taking another charge +q from A to B is W₁ and from B to C is W₂. Which one of the following is correct ?
i) W₁ > W₂
(ii) W₁ = W₂
(iii) W₁ < W₂
What is the amount of work done in moving a point charge around a circular arc of radius r at the center where another point charge is located ?
An electron is accelerated through a potential difference V. Write the expression for its final speed, if it was initially at rest.