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This experiment comprises of two coils, Constant Current Power Supply and Gaussmeter. The Gaussmeter probe is placed on a rail with a ruler. It can move smoothly and accurately for measurement of magnetic field along the centre of the coils. The following studies are carried out with the set-up: 1. Study of magnetic field due to one coil and meaurement of its diameter. 2. Study of principal of super-imposition of magnetic field due to its 2nd coil by keeping the distance between the coils at a, greater than a and less the radius of the coil, Line 1 Magnetic Profile when the distance between the coils is greater than radius of the coil Line 2 Magnetic Profile when the distance between coils is equal to radius of the coil Line 3 Magnetic Profile when the distance between coils is less than radius of the coil –It Superimposed completely Apparatus consists of the following: 1. Digital Gaussmeter Range: 0-200 Resolution: 0.1G Accuracy: 0.5% Display: 3½ digit 7 segment LED with autopolarity. 2. Two Coil Diameter: 200mm Number of turn: 1000 3. Constant Current Power Supply Current: 0-0.5A Smoothly adjustable Line Regulator: 0.2%for 10% mains variation. Load Regulator: 0.2 % for 0 to full load. Display: 3½ digit 7 Segment LED Display. Protection: Against overload/ short current. The 2 coils are rested on platform one coil is fixed and other coil move smoothly on a rail along with the axis of the coils..
Planck's Constant Experiment (By Photoelectric Effect) for Physics Lab- It is used for Determining of Planck's Constant and Work Function of Materials by Photoelectric Effect It was observed that most metals under influence of radiation, emit electrons. This phenomenon was termed as photoelectric emission. The apparatus comprises of the following : 1. Photo Sensitive Device : Vacuum photo tube. 2. Light source : Halogen tungsten lamp 12V/35W. 3. Colour Filters : 635nm, 570nm, 540nm, 500nm & 460nm. 4. Accelerating Voltage : Regulated Voltage Power Supply, Output : ± 15 V continuously variable through multi-turn pot Display : 3½ digit 7-segment LED Accuracy : ± 0.2% 5. Current Detecting Unit : Digital Nanoammeter It is high stability low current measuring instrument Range : 1000 mA, 100 mA, 10 mA & 1mA with 100 % over ranging facility Resolution : 1nA at 1 mA range Display : 3½ digit 7-segment LED Accuracy : ±0.2% 6. Power Requirement : 220V ± 10%, 50Hz. 7. Optical Bench : The light source can be moved along it to adjust the distance between light source and phototube scale length is 400 mm. A drawtube is provided to install colour filter, a focus lense is fixed in the back end. T
This experiment is used for measuring electromagnetic charge to mass ratio of the electron. The electromagnetic tube is bulb-like and contains a filament, a cathode, a grid, a pair of deflection plates and an anode.
This experiment is used to measure the charge of an electron and is perhaps the most basic of all experiments.The experiment depends on the ability to control, measure and balance very small force of the order 10-14N. The set-up consists of two horizontal parallel plates separated by about 5mm. The upper plate has a small hole through which microscopic oil droplets are sprayed in between the two plates with the help of an atomizer.
This test is done to remove the error due to contact resistance, which is significant in the electrical measurement on semiconductors, is avoided by the use of two extra contacts (probes) between the current contacts.
This form of spectroscopy is used in the investigation of crystal structures, environmental effects, dynamic effects, defects in solids and in many branches of Physics.