Showing 10–18 of 74 results

Decade Inductance Box – 7 Dial

Description

Housed in a box with seven dials and fitted with 4 mm output plugs, the unit allows a range of inductances from 1ΩH to 10ΩH. 7 Decade Inductance Box (i) 1ΩH to 10ΩH in steps of 1ΩH (ii) 10ΩH to 100ΩH in steps of 10ΩH (iii) 100ΩH to 1mH in steps of 100ΩH (iv) 1mH to 10mH in steps of 1mH (v) 10mH to 100mH in steps of 10mH (vi) 100mH to 1mH in steps of 100mH (vii) 1mH to 10mH in steps of 1mH

Demonstration Dynamo Model

Description

The dynamo model is mounted on a base with a driving wheel. Output is through 4 mm sockets and a low voltage bulb is also provided as a simple output indicator.

Demonstraton Electric Bell

Description

Mounted on panel, large size parts and visible wiring. Operates on 4 – 6 V DC

Demonstraton Electric Bell

Description

The large size of this battery operated apparatus allows students to better understand the operation of this basic circuit. Works on 9 V Battery. Includes Instructions. On wooden stand.

Demountable Transformer

Description

This heavy duty demountable transformer can be used for the study of transformertheory and many other alternating current phenomena. This kit consists of: 1. A magnetic circuit made of highly permeable U shape metal sheet, which can be closed using two clamps with tightening screws. 2. Section: 40 x 40 mm with 150 mm length and 170 mm height. 3. One coil of 6000 turns with maximum current of 0.2 A. Intermediary coil of 2000 turns output. 4. One coil of 600 turns with maximum current of 2.5 A, which is mainly used to create the primary of transformer. 5. One coil of 1200 turns with maximum current of 1.25 A, fitted with intermediary 400 and 800 turns outputs. 6. One coil of 72 turns with maximum current of 12 A, fitted with intermediary 6, 30, 54 and 66 turns outputs. 7. Power supply cable.

Direction of Current

Description

Red and green LED’s are fitted in a plastic enclosure in such a way that they indicate the direction of current flowing in the circuit. Connection can be made via 4 mm sockets

Double ‘C’ Core & Clip

Description

As used in Westminster Electromagnetic Kit. Size 90 x 50 x 22 mm

Dynamo

Description

With driving wheel, to generate current, mounted on polished wood base with driving wheel in vertical position, a lamp holder and a lamp. Output DC Current Output both DC and AC current

Earth, Neutral And Live Board Demonstration

Description

This apparatus is an effective demonstration of how the earth wire and fuse act together to protect both the user and the appliance. When the appliance is connected correctly and the LEDs in the appliance will illuminate to show the appliance is working. A fault is then demonstrated by swapping the live wire from inside the appliance to the case to show either the fuse melts (protecting the user and appliance) or in the case of no earth wire, the LEDs illuminate to indicate the passage of current through the person to ground. The fuse is easily visible and can be seen to ‘blow’ when a fault occurs.The unit is supplied with 10 m of fuse wire and full instructions. A 12 V DC power supply is required. Connections are made via 4 mm shrouded sockets.