Resistance Demonstration Set
Resistance Demonstration Set demonstrates the relation between resistance and cross section of different wires. This set has 2 copper and 2 nichrome wires of different diameters. A pair of colour-coded terminal used for power supply connection. This set uses 6V DC to operate.
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When a 12VDC supply is connected (not supplied) the LED lights to show that current is flowing in the external circuit and the bi-metal strip can be seen to bend as its heater coil raises the temperature. After a few minutes the bending is sufficient to trip the mechanism and the current path is broken. At any current selection a short circuit situation can be initiated by pressing the red button and this produces an immediate response from the solenoid to disconnect the supply.PH50136C -
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Includes:
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- Solder Trough – Effectively a single turn coil in the form of a circular trough. Approximately 300 mm of solder is formed into a 50 mm dia meter circle to lie in the trough.
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Demountable Transformer
This heavy duty demountable transformer can be used for the study of transformer theory and many other alternating current phenomena. This kit consists of:
- A magnetic circuit made of highly permeable U shape metal sheet, which can be closed using two clamps with tightening screws.
- Section: 40 x 40 mm with 150 mm length and 170 mm height.
- One coil of 6000 turns with maximum current of 0.2 ampere. Intermediary coil of 2000 turns output.
- One coil of 600 turns with maximum current of 2.5 ampere, which is mainly used to create the primary of transformer.
- One coil of 1200 turns, with maximum current of 1.25 ampere, fitted with intermediary 400 and 800 turns’ outputs.
- One coil of 72 turns, with maximum current of 12 ampere, fitted with intermediary 6, 30, 54 and 66 turns’ outputs.
- Power supply cable.
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The classic demonstration transformer apparatus is added with some additional safety features. Rather than the traditional mains (220-230V AC) coil we have designed a dedicated Demonstration Transformer Power Supply with fixed (25V AC) voltage and high current output to which 100-turn or 150-turn mains coil substitutes connect. The advantage is that no lethal mains voltage is involved, instead the voltages to these mains coil replacements is 25V AC and so safe. Additional AC and DC outputs are provided up to 4V for other experiments.
PH50172A
