Polar Materials

The molecules of many dielectrics possess an electric dipole moment without having an external electric field. In such molecules centres of their positive and negative charges are displaced with respect to each other and therefore form a dipole. Such materials are known as polar materials. These dipoles are oriented in a random fashion in the absence of an electric field. Under the influence of an electric field these dipoles orient themselves in the direction of applied. The stronger the field the greater will be the number of dipoles pointing in the direction of the field.

#### Related Questions in Physics

• ##### Q :Describe the term ntu in thermodynamics

Describe the term ntu in thermodynamics? Illustrate in short.

• ##### Q :Define Carnots theorem Carnot's theorem

Carnot's theorem (S. Carnot): The theorem that states that no engine operating between the two temperatures can be more proficient than a reversible engine.

• ##### Q :Dynamic strain aging and the strain

What is the basic difference among the dynamic strain aging and the strain aging?

• ##### Q :Explain Stern-Gerlach experiment

Stern-Gerlach experiment (O. Stern, W. Gerlach; 1922): The experiment which explains the features of spin (that is intrinsic angular momentum) as a different entity apart from the orbital angular momentum.

• ##### Q :Define neuro-modulators What do you

What do you mean by the term neuro-modulators? Briefly define it.

• ##### Q :Define Coulomb or SI unit of electric

Coulomb: C (after C. de Coulomb, 1736-1806): The derived SI unit of an electric charge, stated as the quantity of charge shifted by a current of 1 A in a period of 1 s; it therefore has units of A s.

• ##### Q :Explain the cause of Brownian motion

Briefly define or explain the cause of Brownian motion?

• ##### Q :Problem on synchronous TDM We require

We require using synchronous TDM and joining 20 digital sources, each of 100 Kbps. Each and every output slot carries 1 bit for each digital source, however one extra bit is added up to each frame for synchronization.

##### Q :Problem on two coupled coils connected

In a series adding connection, two coupled coils have equivalent inductances LA; in a series opposing connection, LB. Determine an expression for M in terms of LA and LB. What does the outcome suggest?

• ##### Q :What is Loschmidt constant or Loschmidt

Loschmidt constant: Loschmidt number: NL: The total number of particles per unit volume of an ideal gas at standard pressure and temperature. It has the value of 2.687 19 x 1025 m-3.