Advertisements
Advertisements
प्रश्न
Why must electrostatic field be normal to the surface at every point of a charged conductor?
उत्तर
In case of conductors the charge is present only on the outer surface. Inside the conductor the field is zero. And at the surface it has to be normal. If it is not normal to the surface, then it would have some non-zero component along the surface. The free charges on the surface would then experience a force and start moving. In a static situation, electrostatic field should not have tangential component, which in turn implies that the surface of a charged conductor must be normal to the surface at every point. If a conductor has no surface charge, then the field is zero.
APPEARS IN
संबंधित 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?
We know that electric field is discontinuous across the surface of a charged conductor. Is electric potential also discontinuous there?
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 ____________.
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-
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
