Advertisements
Advertisements
प्रश्न
Why is there no work done in moving a charge from one point to another on an equipotential surface?
Advertisements
उत्तर
On an equipotential surface, the potential remains constant and thus potential difference (ΔV) is zero. The work done on a charge q is given as
W = qΔV
Now, as ΔV = 0
We conclude that W = 0
So, the work done in moving a charge from one point to another on an equipotential surface is zero.
APPEARS IN
संबंधित प्रश्न
Describe schematically the equipotential surfaces corresponding to
(a) a constant electric field in the z-direction,
(b) a field that uniformly increases in magnitude but remains in a constant (say, z) direction,
(c) a single positive charge at the origin, and
(d) a uniform grid consisting of long equally spaced parallel charged wires in a plane.
The discharging current in the atmosphere due to the small conductivity of air is known to be 1800 A on an average over the globe. Why then does the atmosphere not discharge itself completely in due course and become electrically neutral? In other words, what keeps the atmosphere charged?
Draw the equipotential surfaces due to an electric dipole. Locate the points where the potential due to the dipole is zero.
Define equipotential surface.
Depict the equipotential surface due to
(i) an electric dipole,
(ii) two identical positive charges separated by a distance.
Assertion: Electric field is discontinuous across the surface of a spherical charged shell.
Reason: Electric potential is continuous across the surface of a spherical charged shell.
Equipotentials at a great distance from a collection of charges whose total sum is not zero are approximately.
Prove that a closed equipotential surface with no charge within itself must enclose an equipotential volume.
Find the equation of the equipotentials for an infinite cylinder of radius r0, carrying charge of linear density λ.
Equipotential surfaces are shown in figure. Then the electric field strength will be ______.
