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Hall effect experiment:- Determination of charge carrier density
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Procedure:

 

Controls

 

Combo box

Select procedure: This is used to select the part of the experiment to perform.

1) Magnetic field Vs Current.
2) Hall effect setup.

Select Material: This slider activate only if Hall Effect setup is selected. And this is used to select the material for finding Hall coefficient and carrier concentration.

 

Button

Insert Probe/ Remove Probe: This button used to insert/remove the probe in between the solenoid.

Show Voltage/ Current: This will activate only if Hall Effect setup selected and it used to display the Hall voltage/ current in the digital meter.

Reset: This button is used to repeat the experiment.

 

Slider

Current : This slider used to vary the current flowing through the Solenoid.

Hall Current: This slider used to change the hall current

Thickness: This slider used to change the thickness of the material selected.

  

 

Procedure for doing the simulation:

 

 To measure the magnetic field generated in the solenoid

 

  • Select Magnetic field Vs Current from the procedure combo-box.

 

  • Click Insert Probe button

 

  • Placing the probe in between the solenoid by clicking the wooden stand in the simulator.

 

  • Using Current slider, varying the current through the solenoid and corresponding magnetic field is to be noted from Gauss meter.

 

 

Trial No: Current through solenoid Magnetic field generated
1    
2    
3    
4    

 Table(1)

 

 Hall Effect apparatus

 

  •  Select Hall Effect Setup from the Select the procedure combo box

 

  • Click  Insert Hall Probe button 

 

  • Placing the probe in between the solenoid by clicking the wooden stand in the simulator.

 

  • Set "current slider" value to minimum.

 

  • Select the material from “Select Material” combo-box.

 

  • Select the Thickness of the material using the slider  Thickness.

 

  • Vary the Hall current using the sllider  Hall current.

 

  • Note down the corresponding Hall voltage by clicking “show voltage” button.

 

  • Then calculate Hall coefficient and carrier concentration of that material using the equation 

 

RH=VHt/(I*B)

Where RH is the Hall coefficient  

RH=1/ne

 And n is the carrier concentration

  •  Repeat the experiment with different magnetic file.

Trial

No:

Magnetic Field

(Tesla T)

Thickness (t)

m

Hall current,

mA

Hall Voltage

mV

    RH          
 1          
 2          
 3          
 4          
 5          

 

 

Procedure for doing real lab

  • Connect ‘Constant current source’ to the solenoids.
  • Four probe is connected to the Gauss meter and placed at the middle of the two solenoids.
  • Switch ON the Gauss meter and Constant current source.
  • Vary the current through the solenoid from 1A to 5A with the interval of 0.5A, and note the corresponding Gauss meter readings.
  • Switch OFF the Gauss meter and constant current source and turn the knob of constant current source towards minimum current.
  • Fix the Hall probe on a wooden stand. Connect green wires to Constant Current Generator and connect red wires to milli voltmeter in the Hall Effect apparatus
  • Replace the Four probe with Hall probe and place the sample material at the middle of the two solenoids.
  • Switch ON the constant current source and CCG.
  • Carefully increase the current I from CCG and measure the corresponding Hall voltage VH. Repeat this step for different magnetic field B.
  • Thickness t of the sample is measured using screw gauge.
  • Hence calculate the Hall coefficient RH using the equation 5.
  • Then calculate the carrier concentration n. using equation 6.

 

Result

Hall coefficient of the material = .........................
Carrier concentration of the material =..........................  m-3
   

 

  

 

 

 

Cite this Simulator:

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