If a current-carrying metallic conductor strip is located in a magnetic field B perpendicular to the direction of the current flow I, a transverse electrical field EH and a potential difference is produced (Hall effect).
The following equation holds for the Hall voltage UH
UH 1/(n-e) (B-l)/d B: magnetic flux density
I: current through the metallic conductor
d: thickness of the band-shaped conductor
n: concentration of charge carriers
e = 1.602-10-19 C: elementary charge
The Hall voltage UH is caused by the deflection of the moving charge carriers in the magnetic field due to the Lorentz force, whose direction may predicted by the right hand rule. The factor
1/(n-e) is called Hall constant RH:
RH 1/(n-e) 1/(n-e)
The sign of the Hall constant RH is determined by the polarity of the charge carriers, predominantly responsible for the current.
Hight Sensitivity digital microvoltmeter with 1 microvolt resolution.
Compact Electromagnet arrangement with U-core and yoke produce magnetic field upto 1T.
DC Regulated Power Supplies with short circuit protection and safety Sockets.
Power Supplies can be used as constant current and constant voltage source.
Stackable power supplies and gauss meter
Digital Gauss meter with 2k & 20k Gauss capacity and resoltion 1 and 10 Gauss.
Objectives
To determine the proportionality of Hall Voltage and magnetic flux density.
To determine the polarity of Charge carriers.
To calculate the Hall constant RH and the charge carrier concentration.
Technical Data
Power Supply : 0-40V DC, 0-10A, Voltage resolution 0.1V, Display 3½ digit LED, Current Resolution 0.1 A, Primary fuse 4 Amp
Power Supply : 0-30V DC, 0-20A, Voltage resolution 0.1V, Display 3½ digit LED, Current Resolution 0.1 A, Primary fuse 8 Amp
Digital Gauss Meter : Range 2k & 20kG, Sensor In As, Resolution 1G & 10 G at 2k & 20k G, Offset By Potentio-meter to set ZERO.
Digital Micro- : Range 1mV, 10mV, 100mV, 1V & 10V Voltmeter with 100% over-ranging, Resolution 1µV, Accuracy ±0.2% ±1 digit, Stability Within ±1 digit, Input Impedance >1000 Mohm (10Mohm on 10V range), Display 3½= digit, 7 segment LED with autopolarity and decimal indication, Weight 2.5Kg, Dimensions 2 4 5 m m X 2 8 0 m m X 120mm.
Electro magnet : Coils 500 T, Current 7A (Max.), 4mm safety socket, Ferromagnetic “U” core, 150 x 130mm(LxH),40 x 40mm cross section, I Core L=150mm, 40x40mm cross section, Field Capacity 1T(Max.)
Sample : Dimenion 20 X 85 mm, Silver thickness 5 x 10-5 m, Tungsten thickness 6 x 10-5 m
