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 

 

R_H=V_Ht/(I*B)

Where R_H is the Hall coefficient  

R_H=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 V_H. Repeat this step for different magnetic field B.
• Thickness t of the sample is measured using screw gauge.
• Hence calculate the Hall coefficient R_H using the equation 5.
• Then calculate the carrier concentration n. using equation 6.

 

Result

Hall coefficient of the material	= .........................
Carrier concentration of the material	=.......................... ÃƒÂ¯Ã‚»Â¿ m-3