Question

What is Hall Effect? What can be determined from Hall Effect Experiment and what are the applications of Hall effect.

Answer 1

Hall efefct states that if a specimen (metal or semiconductor) carrying the current I is placed in a transverse magnetic field B an electric field intensity E is induced in a direction perpendicular to both I & B.

The specimen must be eitherrectangular shaped or square shaped.

By the use of Hall Effect Experiment we can determine.

1. whether the specimen is metal or semiconductor. If semiconductor we can also determine whether it is intrinsic, n-type or p-type.

2. The carrier concentration in the specimen.

3. The mobility of majority and  minority carriers.

4. To determine magnetic field intensity H directly preportional B = phi/A wb/m^2. Wb is weber. m^2 is metre square.

Applications 

Magnetic field meter. It is an instruementwhich measures magnetic field intensity.

Hall Effect multiplier. It is an instruement which multiplies two input signals I & B in the output as VH. (Hall Voltage).

 

 

 

Hall Effet states that if a speciment metal or semiconductor  acrrying the current I is placed in a transverse magnetic field B an electric field intensity E  is induced  in a direction perpendicular to both I  & B.