A & V Enterprises

TECHNICAL SPECIFICATIONS:

Power Supplies:

·   DC Supply 0-5V DC, 150mA (With Negative and Positive Polarity)

·   Operated on Mains power 230V, 50Hz +10%

Digital Meters:

·   Ammeter 20uA DC.

·   Voltmeter 20V DC.

Components are mounted on the panels are:

·   Zero Setting through 10 Turn Potentiometer.

·   Voltage Control through Potentiometer.

·   Stand to hold Photo Cell enclosed in metal box.

·   Light Source is housed in suitable box

·   Mercury Source as Light Source.

·   Color Filters: Red, Yellow, Green, Blue and Voilet.

·   Stand to hold color filter.

·   BNC to BNC lead for interconnection.

·   Optical Bench

SALIENTFEATURES:

·   Front panel built with high class insulated Printed Circuit Board sheet with well printed circuits and      symbols.

·   Instruction manual.

·   Connections are brought out through BNC Terminations.

·   The trainer is housed in Metal and ABS Plastic cabinet.

·   Size of the trainer set 12"x4"

·   Short Circuit Protection through Fuse.

PACKING LIST:

·   Wooden Optical Bench With Scale Stickered

·   Set of 5 Color Filter

·   Photo Cell Unit Housed in Plastic Box

·   100W Lamp Housed in Aluminum Box

·   BNC to BNC Probe

·   Planck's Constant Trainer Unit

Objective:
Hall Effect is an instrument to determination of mobility of charge carriers

Apparatus Supply

1.      ELECTROMAGNET

2.      DIGITAL POWER SUPPLY FOR ELECTROMAGNET

3.      DIGITAL GAUSS METER
4.      CONSTANT CURRENT POWER SUPPLY

5.      WOODEN STAND

6.      HALL CRYSTALS ONLY ONE PROVIDED EITHER N OR P( EXTRA COST OF 2ND CRYSTAL)

                      

ü  N and P Type Hall Crystal Mounted on PCB

ü  Termination: 4Nos. (2mm for Voltage and 4mm for Current)

ü  10mm Rod mounted on PCB to be Hold at Wooden Stand

ü  Type: N

ü  Size: 10mmx8mm

ü  Thickness:

Four Probe Method

Four Probe Method at different temperatures and determination of the band-gap The Four Probe Method is one of the standard and most widely used method for the measurement of resistivity. In its useful form, the four probes are collinear.

Description of the experimental set-up:
1. Probes Arrangement, It has four individually spring loaded probes. The probes are collinear and equally spaced. The probes are mounted in a teflon bush, which ensure a good electrical insulation between the probes. 
2. Smaple: Germanium crystal in the form of a chip. 
3. Oven : This is high quality temperature controlled oven suitable for Four Probe Set-up. The oven has been designed for fast heating and cooling rates, which enhances the effectiveness of the controller. 
4. Four Probe Set-Up The set-up consists of three units housed in the same cabinet. 
(i) Oven Controller
(ii) Multi range Digital Voltmeter
(iii) Constant Current GeneratorThe experimental set-up is complete in all respect.