E-Plane Bend -
for measuring e/m, the charge to mass ratio of the electron is a very simple set-up. It is based on Thomson’s method. The e/m-tube is bulb-like and contains a filament, a cathode, a grid, a pair of deflection plates and an anode. The tube is filled with helium at a very low pressure. Some of the electrons emitted by the cathode collide with helium atoms which get excited and radiate visible light. The electron beam thus leaves a visible track in the tube and all manipulations on it can be seen. The tube is placed between a pair of fixed Helmholtz coils which produce a uniform and known magnetic field. The socket of the tube can be rotated so that the electron beam is at right angles to the magnetic field. The beam is deflected in a circular path of radius r depending on the accelerating potential V, the magnetic field B and the charge to mass ratio e/m. This circular path is visible and the diameter d can be measured and e/m obtained from the relation e/m=8V/B2d2 This set-up can also be used to study the electron beam deflection for different directions of the magnetic field by varying the orientation of the e/m-tube. Description of The Experimental Set Up The central part of the set-up is the e/m-tube. This is energized by Filament current supply Deflection plates voltage supply Continuously variable accelerating voltage supply to the anode. The tube is mounted on a rotatable socket and is placed between a pair of Helmholtz coils. The tube can be rotated about a vertical axis, varying the orientation of the electron beam with respect to the Helmholtz coils.This allows magnetic deflection of the beam to be demonstrated. Circular, helical or undeflected paths can be seen. The direction of the current can be changed. The magnetizing current I and the accelerating voltage V are respectively measured by an ammeter and a voltmeter mounted on the front of the panel. The diameter of the electron beam path is measured by a detachable scale mounted in front of the bulb of the tube. This scale has a slider with a hollow tube (fitted with cross wires at its both ends) to fix the line of sight while making the measurements of the beam path diameter. Base of the unit contains the power supply that provides all the required potentials and the current to the Helmholtz coils. The entire apparatus is contained in a wooden case for convenient storage. Specifications Helmholtz coils of radii 14 Number of turns 160 on each coil Accelerating Voltage 0 – 250V Deflection plates voltage 50V – 250V Operating Voltage 220V AC/ 50Hz Typical results obtained with the above set-up for variation of the diameter of the electron beam path with the accelerating voltage for a current of 1A to the Helmholtz coils are shown in the following graph. They lead to e/m equal to 1.77 x 10 11 coul/kg.....Product Code: HS-LAB0006 - (e/m Experiment for Physics Lab for High School Science Kits Lab)
e/m Measurement Setup - Microcontroller based power supply instrument for CRT. LCD display to measure deflection voltage. E/M Measurement Setup
e/m Measurement Setup is a very useful product for Physics and Basic Science Laboratories. This is used to find the specific charge density of an electron particle in a CRT by Thomson method using BAR magnet. This system is provided with a power supply unit for CRT and Deflection Magnetometer with stand arrangement and mounting stand for CRT. Nvis 6103 is a microcontroller based instrument with LCD display for displaying deflection voltage. It is highly secure and stable system.
Microcontroller based power supply instrument for CRT
LCD to measure deflection voltage
Focusing adjustment provided
Intensity adjustment provided
Cathode Ray Tube mounting on acrylic stand
Deflection magnetometer provided
Octal socket provided on the front panel of power supply for connecting CRT
Provided with Pair of bar magnet and Compass Box
Learning material CD....
EARTH FAULT RELAY(ELECTROMECHANICAL TYPE)....Product Code: EPRL-0001 - (EARTH FAULT RELAY(ELECTROMECHANICAL TYPE))
Globe Model Of Earth - Earth Model 7 Parts: Showing the layers inside the Earth with 7 detachable parts showing the interiors of Earth. Different colours for different layers. When upper crust is removed, inner core with layers can be seen. When layers one by one are removed you can find the periphery of each layer.....Product Code: GEOM-0013 - (Earth Model 7 Parts for Earth Science Lab)
for Soil Testing - Capable of measuring earth voltage (V A.C.) 2mA measuring current permits the testing of earth resistance without tripping earth leakage current circuit breakers in the circuit. Auto power off function. The timer operates auto power off function. The time operates the \\\"PUSH BUTTON SWITCH\\\" and \\\"TIMER ON BUTTON\\\' are pressed together. This will keep the test \\\"NO\\\" for about three to five minutes. Then auto power off. Battery operated Data hold function Small and light weight IEC 1010 CAT III 200V Calibration performed with supplied test leads Measurement Ranges Earth Resistance: 0-20W/0-200W/0-2000W Earth Voltage: 0-200V AC (40-500Hz)....Product Code: NSOL-T41 - (Earth Resistivity Meter For Testing Lab for Soil Testing Lab)
Earthworm Dissection Model showing the external character in a portion and the dissection in the remaining, exhibiting all important systems, mounted on base with key card.....Product Code: BZOM-0012 - (Earthworm Anatomical Model for Biology Lab)
Eccentric Model, technical teaching equipment for engineering - Heat Transfer Training Systems and Heat Lab Engine Trainers....Product Code: NEMHTM50 - (Eccentric Model - Heat Transfer Training Systems and Heat Lab Engine Trainers for engineering schools)
Eddy Current Drive - 9....Product Code: ADM-055 - (Eddy Current Drive - 9 for Electric Motors Teaching Labs)
EDDY Current Dynamometer for Motor Testing for Electric Motors Teaching Labs for Electrical Lab - This Model is an educational model suitable for demonstrating to students the complete know of the Basics,Components, Mechanicals, Loading methods, Torque evaluation, Loading scheme, Wear & Tear & Maintenance of these motors packaged in small rating. Students can make connections of their own with the help of the terminations provided for study of features viz Coupling the motor to be tested, Starting methods, Speed-Torque, Excitation control of Dynamometer, Torque measurement. (Providing Load cells is an option) Technical Specs : Power ratings available : 1KW / 2KW/ 5KW/ 10KW Voltage Input: 230V AC to Exciter unit Rpm of Machine 1500 Single shaft extension, SPDP, IP23, IC01, B3, Class-B, S1, Solid yoke List Of Experiments: Load testing of D Load testing of AC Motor C Motor Torque calculation at various rpm Speed-Torque Analysis Voltage-Speed Analysis Speed reversal Efficiency Analysis Blocked rotor test Cold Resistance & Hot Resistance Motor Operation parameters Basic Overhauling Know how....Product Code: ADM-013-NE - (EDDY Current Dynamometer for Motor Testing for Electrical Lab)
Eddy current NDT equipment
Operates with encircling, sector, or rotary test
- Differential and/or Absolute mode operation
- Up to 8 test channels; Broad test frequency selection – l KHz to 5MHz
- Store & recall setups; print & transfer data
- Inspect tube or bar, magnetic or non-magnetic
- Weight: (104.54 kg.) for cabinet.
- Air conditioner (additional) (21.8 kg)
- Power Requirement 240 V, ac, 50/60 Hz, single phase, 5 amps (not including the air conditioner).... Product Code: NDT5 - (Eddy current NDT equipment)
A copper cylindrical vessel fitted with 5 different rods of copper, brass, iron, aluminium, & zinc.
Education Science Equipment....Product Code: LABS-EDU-00018 - (Education Science Equipment for Teaching Equipments Lab)
Educational Aids Description: Manufacturer of the volcanic system, rock and volcanoes, glacial landscape, set of assorted soil - set of 21, restless earth & educational aids. Rock And Volcanoes, The Volcanic System, Restless Earth, Glacial Landscape....Product Code: NLAB-0117 - (Educational Aids for School Science Lab)
Educational and Training Software
DVDs for ATA 100 Systems Aircraft training or equivalent
Educational Car Model, technical teaching equipment for engineering - Automobile Engineering Model and Training System....Product Code: NEAUTOM04 - (Educational Car Model - Automobile Engineering Model and Training System for engineering schools)
Educational Charts A striking representation of Human Skin in vertical section revealing all its layers and other internal details is shown wit a magnificent representation of five types of receptor cells with the nature of sensitivity caused by different stimuli True to nature and as seen under a microscope the red blood corpuscles and white blood corpuscles are presented in brilliant colours. One can easily perform the grouping of blood into A,B,AB, and O groups by seeing this informative chart.
Educational Compass for Physics Lab - Card marked with points of compass & degrees. 175 mm overall diameter. 110 mm needle in case.....Product Code: PMAG-0019 - (Educational Compass for Physics Lab)
Educational Model of Planetary Gear
This product is an educational model of a planetary gear. This model clearly and instructively shows the operating system of a planetary gear and the available gearshift possibilities. Every automatic vehicle transmission has a planetary gear. It is mounted on a base.
• Sliding Shifter
• Sun Gear Control Knob
• Carrier Gear Controller
• Ring Gear Controller
• Mounted on a Base....
Educational Model of Planetary Gear This product is an educational model of a planetary gear. This model clearly and instructively shows the operating system of a planetary gear and the available gearshift possibilities. Every automatic vehicle transmission has a planetary gear. It is mounted on a base. SPECIFICATIONS: • Sliding Shifter • Sun Gear Control Knob • Carrier Gear Controller • Ring Gear Controller • Mounted on a Base....Product Code: TechnicalLab0423 - (Educational Model of Planetary Gear)