Advertisements
Advertisements
प्रश्न
A small test charge is released at rest at a point in an electrostatic field configuration. Will it travel along the field line passing through that point?
Advertisements
उत्तर
Yes,
If a small test charge is released at rest at a point in an electrostatic field configuration, then it will travel along the field lines passing through the point, only if the field lines are straight. This is because the field lines give the direction of acceleration and not of velocity.
संबंधित प्रश्न
In a hydrogen atom, the electron and proton are bound at a distance of about 0.53 Å:
(a) Estimate the potential energy of the system in eV, taking the zero of the potential energy at infinite separation of the electron from proton.
(b) What is the minimum work required to free the electron, given that its kinetic energy in the orbit is half the magnitude of potential energy obtained in (a)?
(c) What are the answers to (a) and (b) above if the zero of potential energy is taken at 1.06 Å separation?
We know that electric field is discontinuous across the surface of a charged conductor. Is electric potential also discontinuous there?
Guess a possible reason why water has a much greater dielectric constant (= 80) than say, mica (= 6).
Two point charges of 10C each are kept at a distance of 3m in the vacuum. Calculate their electrostatic potential energy.
Three point charges +q each are kept at the vertices of an equilateral triangle of side 'l'. Determine the magnitude and sign of the charge to be kept at its centroid so that the charges at the vertices remain in equilibrium.
Two-point charges placed in a medium of dielectric constant 5 are at a distance r between them, experience an electrostatic force ‘F’. The electrostatic force between them in vacuum at the same distance r will be ____________.
A body moves from point A to B under the action of a force, varying in magnitude as shown in the figure. Force is expressed in newton and displacement in meter. What is the total work done?

Three point charges +2, +2, and +5µC are placed respectively at the vertices A, B, C of an equilateral triangle of side 0.2 m. The magnitude of the force experienced by the charge at C is ______.
Two point charges placed in a medium of dielectric constant 5 are at a distance r between them, experience an electrostatic force 'F'. The electrostatic force between them in vacuum at the same distance r will be-
If stretch in a spring of force constant k is tripled then the ratio of elastic potential energy in the two cases will be:
A work of 100 joule is performed in carrying a charge of 5 coulomb form infinity to a particular. point in an' electrostatic field. The potential of this point is:-
In bringing one electron towards another electrons, the electrostatic potential energy of the system will.
When one electron is taken towards the other electron, then the electric potential energy of the system ______
Three-point charges Q, q and -q are kept at the vertices of an equilateral triangle of side L as shown in the figure. What is

- the electrostatic potential energy of the arrangement? and
- the potential at point D?
