Physics | Current Electricity | Electricity and Magnetism A. Electrode Holder A
A robust acrylic base, 130mm wide with two crocodile clip holders. The crocodile clips hold standard 5mm carbon rod or strip metal electrodes and can be connected to with 4mm leads.
For use in electrolysis, electro-plating etc. Dimensions: 128 x 35 x 25mm. Mass 0.034kg.
E8R07712 B. Conducting Putty
Conducting putty is a unique and versatile aid to the teaching of the topic of resistivity and the dependence of resistance on length and cross- sectional area of the conductor. The material is supplied in ‘blobs’ of approximately 100g in mass. A cylinder 60mm long and 20mm in diameter has a resistance of about 20O. Coins or washers placed on the ends of the cylinder can be used to connect it into a circuit. By altering the length and diameter in simple multiples, the relationship can quickly be established.
The substance is harmless, but messy, so plastic gloves are supplied for handling the putty.
Direct Delivery - up to 2 weeks. E8C53157
C. Component Holders B
Two crocodile clips (with sleeves which accept 4mm plugs) mounted on a 90mm length of tough black plastic channel.
E8H27337 pack 8 £44.23 D. Investigating Resistivity Apparatus
Low cost apparatus for student investigation into resistance, length and cross-sectional area also acts as a bridge or potentiometer.
This 40cm Resistance Board is designed to allow students to investigate resistance quantitively. The board is fitted with 4mm terminals connected by a length of resistance wire against a scale, and a “jockey”.
Wire samples are provided. These are 0.30mm, 0.44mm and 0.54mm in diameter. Experiments into the relationship between resistance and cross- sectional area can easily be conducted. If required other types of material can be connected between the sockets and their resistance investigated.
Sockets are provided to enable the board to be used as a 40cm bridge/potentiometer. The Unilab Basic Student Meter (B8H30981) fitted with appropriate shunt is ideal for use with this board. Power can be provided by a 1.5V SP2 (R20) battery and or any low voltage power supply (e.g. Lockmaster B8G85469).
E8H27106 C £64.01 £24.38 £9.39
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