Page 11 - Electrical Materials_Neat

Electrical Materials

(i) Permeability
It is property of magnetic material which indicates that how easily
magnetic flux is build up in material. It is determined by ratio of magnetic
flux density to magnetizing force producing this magnetic flux density.

(ii) Hysteresis
Magnetic Hysteresis is an important material by which is firstly becomes
magnetized and then de-magnetization process. Lack of retrace ability of
magnetization curve is called hysteresis and is related to existence of
magnetic domains in material. Magnetic hysteresis is rising temperature
at which given material ceases to be ferromagnetic, or falling temperature
at which it becomes magnetic.

(iii) Coercive Force
This force defined as magnetizing force which is essential to neutralize
completely magnetism in an electromagnet after value of magnetizing
force become zero. Also read Engineering Materials -Comparison
between Crystal Slip and Twinning.

3.2. Optical Properties
Optical properties that define material response to incident radiation can

be described as transmission, reflection and absorption.

4. Semiconductors Devices
4.1. Semiconductors Materials
 N-type Materials

Figure 5

 Majority Carriers : Electrons
 Minority Carrier: Holes.

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