Hall effect - semiconductor, Electrical Engineering

Explain hall affect and derive the mathematical expression for hall coefficient, also describe its applications.

Sol. Hall effect

If a metal or semiconductor material carrying current I is placed under a transverse magnetic field B, then an electric field E is developed in the direction perpendicular to both I and B. this phenomenon is called as Hall Effect and is shown in Fig. Assuming that current knows from left to right in x direction and the semiconductor bar is kept under influence of magnetic field B acting in z direction, then bar will experience an electromagnetic force acting in downward direction. In the above fig. if the semiconductor bar is of p type then charge carriers are holes and current I flowing in the bar will be due to movement of holes from left to right. Since the electromagnetic force is acting downward, charge carries are pressed downwards and more holes accumulate near side I. Thus side I become more positively charged with respect to side 2. Therefore a potential difference is developed between side 1 and side. This voltage is called as hall voltage and is denoted as VH. If the semiconductor bar is n type, then current will flow in the given direction because of movement of electrons in opposite direction. Due to force, these charge carriers will accumulate downward near side 1 making it negatively charge with respect to side 2. Hall voltage developed this time is opposite to that of in case of p type semiconductor bar.

Posted Date: 2/8/2013 2:42:05 AM | Location : United States







Related Discussions:- Hall effect - semiconductor, Assignment Help, Ask Question on Hall effect - semiconductor, Get Answer, Expert's Help, Hall effect - semiconductor Discussions

Write discussion on Hall effect - semiconductor
Your posts are moderated
Related Questions
Bureau of Energy Efficiency Setting up of the Bureau of Energy Efficiency The Bureau of Energy Efficiency has been established with effect from 1st March, 2002 under the

Hello, I have some questions pertaining to electromagnetic induction. Could you please give me a hand? Thanks. If we increase the speed of the bar magnet slowly from 0 to 8, and

Give the properties and application of bronze. Bronze : It is alloy of copper and tin. This alloy is very brittle and hard. Its corrosion resistance is better than brass. Bron


how the clipper circuits are working? explanation of working of clipper circuits

Q. What do you mean by Companding? In order to lower the crest factor of a waveform, so as to produce better performance, a process known as companding is used. It works like a

i. Each computer related to the public internet has a unique Internet Protocol address caleed as the IP address. The IP address is a 32-bit address. What is the maximum number of c

L=0.0053nH, C=15µF find the operating frequency of series LC circuit. What factors decides capacitance ..


The project involves comparisons between di erent sampling methods, di erent estimation methods, numerical results using samples selected from a synthetic nite population, and a