Pack of 8 mounted clips to hold components in physics investigations.
High quality holders that can be used for a variety of experiments.

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Protactinium 234 has a half-life of about 70 seconds, and is ideal for the observation of radioactive decay. Supplied in a sealed container with leak-proof closure. The isotope is a product of the Uranium 238 decay series.

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Geiger - Muller Tube Holder, for use with Scaler Timer. An aluminum box which houses the G.M. tube socket. Connection is through a 1 m long co-axial connecting lead, terminated in a standard P.E.T. connector. A 2.2 M? stabilizing resistor is internally wired in series with the anode connection.

General purpose scaler-timer, suitable for radioactivity counting utilising a GM tube and as a general purpose millisecond digital timing device with manual or electronic triggering. 6-digit, bright green LED display. Manual or timed counting of 1, 10 or 100 seconds. Auto ranging on timing modes. Press-to-read switch to read the accurate applied voltage to the GM tube. Built in loudspeaker and switch on the back of the machine allows audible indication of counts when required.

Specifications : 
Operation : Timer / Scaler
GM tube Voltage : 300 V to 500 V
Fuse : 315 mA (L) slow-blow
Capacity : 999,999 counts or seconds
Input power: 230 V ±5%, 50 Hz
Timing inputs : Manually switched start/stop; light gate(s) operated start/stop
Dimensions: 208 x 155 x 115 mm (W x H x D).
Height including handle is 187 mm.

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Highly evacuated electron tube with focusing electron gun and fluorescent screen inclined relative to the beam axis, so that the path of the beam can be seen and the effects of electric and magnetic fields can be studied. By adjusting the electric field so that it cancels the magnetic deflection, it is possible to determine the specific charge e/m and the velocity of the electrons. The electron beam can be deflected electrically in the electric field of the built-in plate capacitor, and magnetically by using the Helmholtz coil pair D. Instructions included.

Specification :
Filament voltage : 6.3 V AC
Max. anode voltage : 5000 V
Glass bulb :  approx. 130 mm diameter
Anode current : approx. 0.1 mA at 4000 V
Max. capacitor voltage :  5000 V
Fluorescent screen: approx. 90 x 60 mm²
Total length : approx. 260 mm.

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This holder is the mounting point for the entire line of Teltron Student (‘S’) Series and related accessories, such as the Helmholtz Coils S and Auxiliary Coil. The slots for holding coils have metric rulings to ensure precise adjustments with a maximum spacing of 150 mm. An easily replaceable fuse is located in the holder to protect the valuable tubes from excessive voltage. The Auxiliary Coil can be inserted into the stepped front side of the tube holder.

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The microscope is mains or battery powered with 3 AA batteries (not included).
Four rubber feet ensure stability and eliminate vibration.
A monocular biological microscope with 400x magnification. 
The microscope is an ideal starter microscope for educational laboratory use.
Mains lead included

Specifications
Objective:Achromatic 4X, 10X, 40X
Magnification: 40X, 100X, 400X
Viewing Head: Monocular lnclined at  45°, 360° Rotatable
Eyepiece: Wide Field 10X/18mm
Stage: Plain stage with slide clips, 90mmX90mm 
Condenser: Single lens with Disc diaphragm
Focusing: Coaxial coarse & fine focusing adjustment. Fine focusing scale value 0.002mm 
Light Source: 220V/1W LED illumination

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Highly evacuated electron tube for demonstrating the wave nature of electrons through the observation of interference caused by passage of electrons through a poly crystalline graphite lattice (Debye-Scherrer diffraction) and rendered visible on a fluorescent screen. Instructions included. Also intended for determining the wavelength as a function of the anode voltage from the radii of the diffraction rings and the lattice plane spacing of graphite, as well as confirming de Broglie’s hypothesis.

Specifications :
Max. filament voltage : 6.3 V AC
Max. anode voltage : 5 kV
Anode current : approx. 0.1 mA at 4 kV
Lattice constant of graphite : d10 = 0.213 nm ; d11 = 0.123 nm.

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