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Home » Physics Laboratory Instruments   »   Boltzman Constant Kit
Boltzman Constant Kit

Objective: Determination of Boltzmann Constant from forward I – V characteristics of Si-diode.

 
Boltzmann Constant Kit Boltzmann Constant Kit
Code: BCK-001

Boltzman Constant Kit   

Objective: Determination of Boltzmann Constant from forward I – V characteristics of Si-diode.

Theory: The I – V characteristics of a semiconductor diode can be used to determine Boltzmann Constant accurately with the help of this simple equipment with ease and convenience.
Diode equation can be written as
               
If applied voltage V >> kT/e, the Boltzmann constant can expressed as:     
where  is the slope of the straight line drawn between V and ln(I)
The setup facilitates to measure the voltage and current across the sample in forward bias as tabulated below:

From table above, plot a graph between V and ln (I) and Boltzmann constant can be calculated from the eqn (1) and slope of the straight line.
Boltzmann Constant Kit consists of the following parts:

A digital dc millivoltmeter to measure the voltage across the diode.
A highly stabilized variable D.C. power supply ( 0 – 5 V)
A digital milliammeter to measure forward bias current in diode.
Diode.