Advertisements
Advertisements
प्रश्न
Guess a possible reason why water has a much greater dielectric constant (= 80) than say, mica (= 6).
Advertisements
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.
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?
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 ____________.
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:
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 ______
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
