Advertisements
Advertisements
प्रश्न
Guess a possible reason why water has a much greater dielectric constant (= 80) than say, mica (= 6).
उत्तर
Water has an unsymmetrical space as compared to mica. Since it has a permanent dipole moment, it has a greater dielectric constant than mica.
APPEARS IN
संबंधित प्रश्न
Three point charges, + Q + 2Q and – 3Q are placed at the vertices of an equilateral triangle ABC of side l. If these charges are displaced to the mid-point A1, B1 and C1, respectively, find the amount of the work done in shifting the charges to the new locations.
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?
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?
What is the work done by the field of a nucleus in a complete circular orbit of the electron? What if the orbit is elliptical?
Obtain an expression for an intensity of electric field at a point at the end of position, i.e., the axial position of an electric dipole.
x
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.
Why must electrostatic field be normal to the surface at every point of a charged conductor?
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 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:-
Potential energy of two equal negative point charges 2µc each held lm apart in air is:-
In bringing one electron towards another electrons, the electrostatic potential energy of the system will.
In a region of constant potential ______.
- the electric field is uniform
- the electric field is zero
- there can be no charge inside the region
- the electric field shall necessarily change if a charge is placed outside the region
A point charge q0 is moving along a circular path of radius a, with a point charge Q at the centre of the circle. The kinetic energy of q0 is ______.