A single contact key mounted on base.
Comprising a plated spring arm with press knob, a contact stud, plated connecting strip and 4 mm terminals.

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U-shaped core of circular section with armature and carrying hook. Wound with insulated copper wire and provided with barrel connections for use with 4-6 volts DC. 110 x 9 mm (diameter). Complete with keeper.

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Show how passing a magnet through a complete loop causes the device to move. Teaches Faraday’s law of induction as well as Lenz’ Law.
No movement at all occurs when using the split loop.

Two masses drop down a 33 cm copper tube. One is steel, one is a neodymium magnet. Includes test masses. When students see the magnetic mass falls more slowly than the steel mass, you can introduce them to electrical eddy currents. The currents oppose downward motion through a moving magnetic field created by the falling neodymium magnet.

Technical specification:-

Eyepiece: Eyepiece PWF 10x (paired) FOV 20mm. Centering Telescope 5x.
Objectives: LWD Plan Achromatic 4x/0.1 W.D. 18mm
Focusing: Two large focus control knobs low down at a convenient position assure accurate focusing. The backlash free Rack & Pinion mechanism has 18mm (approx.) range. Highly sensitive fine focusing knob is provided.
Illumination: 6V, 20W halogen lamp with spherical collector lens, continuous regulation of the illumination, field diaphragm, pull out filter socket.
Viewing Body: Sidentop Trinocular head inclined at 30°, interpupillary distance adjustable between 55-75 mm, Diopter adjustment ring on ocular provides correction for eye acuity.
Main Body:
A)Co-axial coarse & fine focusing with rubber teats for better grip.
B)Quadruple nosepiece.
C)Prefocusing  lever & tension adjustment ring are on focusing mechanism.
D)Hard coated fixed mechanical stage.
Base: Large & Sturdy base provides stability to the Microscope with built in solid-state transformer for illuminator.
Mechanical Stage: Square plain stage of size 180x150 mm approx. with two extension plates for large bottles and micro-filter work are provided. Two stage clips are provided in drilled holes to accommodate specimen.
Optional Accessories: Micro-photographic Camera, Digital Camera/CCD Camera to microphotograph the microscope specimen & project them on TV or on Laptop Screen.

A brass axle with plastic discs is free to roll along the rails and completes the electrical contact between them. Comprising a strong U-shaped magnet and a pair of brass rails with 4 mm socket terminals.

When the axle is placed on the rails between the poles of the magnet, and a power supply unit is connected, the axle is repelled and rolls along the rails away from the center of the magnetic field.

Low Voltage, high current power supply for uses with Westminster electromagnetic kits, Fleming’s apparatus, etc. 1-0-1 V nominal a.c.

Allows students access to 1 V a.c or 2 V d.c. Output is furnished by rectification of 2 V a.c (unsmoothed).Tolerates short circuit. Short-circuit current is 10 A. Transformer is protected by thermal fuses and slow-blow fuse. 40 A Shottky barrier diode for robust and efficient rectification.

Technical Specification :  
Input voltage : 230 V ±10% 50 Hz
Outputs : 1-0-1 V a.c, 2 V d.c nominal
Dimensions : 208 x 155 x 115 mm (W x H x D).
Height including handle is 187 mm.

For making various types of measurements of angles , Thickness radius, diameter etc.
Magnification: 30x with objectives 2x & Eyepiece 15x with field of view 12mm & working distance about 100mm.
Microscope tube inclined: 45 degree. 
Measuring stage: 150x150mm with travels in X-Y direction. 
Travel range 50 x 50mm having micrometer each of 25mm having least count 0.01mm or 0.005mm.
Rotatory stage graduation 0-360 degree with vernier 6 minutes complete provided with inclined Transmitted light illumination having separate intensity contracts.