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The Number of Electrons in an Insulator is of the Same Order as the Number of Electrons in a Conductor. What is Then the Basic Difference Between a Conductor and an Insulator?

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प्रश्न

The number of electrons in an insulator is of the same order as the number of electrons in a conductor. What is then the basic difference between a conductor and an insulator ?

एक पंक्ति में उत्तर
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उत्तर

The outer electrons of an atom or molecule in a conductor are only weakly bound to it and are free to move throughout the body of the material. On the other hand, in insulators, the electrons are tightly bound to their respective atoms and cannot leave their parent atoms and move through a long distance.

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अध्याय 29: Electric Field and Potential - Short Answers [पृष्ठ ११९]

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एचसी वर्मा Concepts of Physics Volume 1 and 2 [English]
अध्याय 29 Electric Field and Potential
Short Answers | Q 13 | पृष्ठ ११९

संबंधित प्रश्न

(a) A conductor A with a cavity as shown in Fig (a) is given a charge Q. Show that the entire charge must appear on the outer surface of the conductor.

(b) Another conductor B with charge q is inserted into the cavity keeping B insulated from A. Show that the total charge on the outside surface of A is Q + q [Fig. (b)].

(c) A sensitive instrument is to be shielded from the strong electrostatic fields in its environment. Suggest a possible way.


A hollow charged conductor has a tiny hole cut into its surface. Show that the electric field in the hole is `(sigma/(2in_0)) hat"n"`. where `hat"n"` is the unit vector in the outward normal direction, and `sigma` is the surface charge density near the hole.


Infinite charges of magnitude q each are lying at x = 1, 2, 4, 8 ... metre on X-axis. The value of the intensity of the electric field at point x = 0 due to these charges will be ______


Which of the following is three-dimensional continuous charge distribution?


Two large, thin metal plates are parallel and close to each other. On their inner faces, the plates have surface charge densities of opposite signs and of magnitude 17.7 × 10–22 C/m2. What is electric field intensity E:

  1. in the outer region of the first plate, and
  2. between the plates?

There is a uniform spherically symmetric surface charge density at a distance Ro from the origin. The charge distribution is initially at rest and starts expanding because of mutual repulsion. The figure that represents best the speed V (R(t)) of the distribution as a function of its instantaneous radius R(t) is:


Which of the following best defines linear charge density?


What is the SI unit of surface charge density?


For a surface charge distribution, if the surface charge density is σ and a small surface element has area dS, what is the charge element dq?


For a volume charge distribution, if the volume charge density is ρ and a small volume element is dV, what is the charge element dq?


Which type of charge distribution is represented as three-dimensional (3D)?


A metal plate is an example of which type of charge distribution?


For a surface charge distribution, what is the integral form of the electric field?


For a volume charge distribution, what is the integral form of the electric field?


For a uniform charge distribution, what is the mathematical representation of charge density?


For a non-uniform charge distribution, how is charge density mathematically represented?


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