Four Probe Apparatus
Experimental Setup to determine resistivity of semiconductors by four probe method at different Temperatures & Determination of Band gap
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- # 3-B, Durga Nagar, Ambala Cantt-133001, Haryana (India)
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Scope : Resistivity of semiconductors by four probe method at different Temperatures & Determination of Bandgap
Features : Resistivity of semiconductors by four probe method at different Temperatures & Determination of Band gap
The experiment consists of the following :
> Four Probe Arrangement
> Oven (upto 200ºC)
> Sample : Ge Crystal mounted
> Thermometer (0-200ºC)
> Four Probe Setup
(a) Constant Current power supply digital Accuracy : +0.25% of the reading +1 digit Load Regulation : 0.03% for no load to full load
(b)Electronic Millivoltmeter 200 mV Accuracy : + 0.1% of reading = 1 digit Impedence : 1 Mohm
Display : 3 digit, 7 segment LED (12.5mm) height with auto polarity and decimal indication
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