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प्रश्न
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?
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उत्तर
Whenever the electron completes an orbit, either circular or elliptical, the work done by the field of a nucleus is zero.
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?
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
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?
The electrostatic potential energy of two-point charges, 1 µC each, placed 1 meter apart in the air 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:-
Potential energy of two equal negative point charges 2µc each held lm apart in air is:-
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
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 ______.
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?
An electric dipole with dipole moment 5 × 10−6 C m is aligned with the direction of a unifrom electric field of magnitude 4 × 105 N/C. The dipole is then rotated through an angle of 60° with respect to the electric field. The change in the potential energy of the dipole is ______.
