Electricity & Cell Lab

Used for measurement of small quantities of electrical charge.

Levelling Screws for balancing the coil. Coil with mirror suspended between long suspension at the upper end and a spring at lower end. Suspension and spring are made of phosphor bronze alloy. Bakelite case, rigid and robust. Clamping arrangement for transportation. Consistent sensitivity over a large period. Strip provided for making it a periodic

4mm Pin, 18mm long spring insert and hard plastic body. Overall lenght of plug 40mm.

Capacitance substitution box ideal for use in industrial and educational environments.
Unit will simulate capacitances from 100pF to 0.47F in steps ratio of 1:2

Used in charging & discharging of a capacitor. C.P. brass strips & pillars. Three terminals fitted on a thick bakelite plate of high insulation. Contact resistance 2 milliohms approx. Maximum current 5 amps. Dimensions : 185 x 15 x 45 mm.

Wound on a plastic bobbin to fit a standard ‘C’ core. The coil is centre hole & provided with 3 mm socketed terminals.

Each centre hole coil is wound on a plastic former & is provided with 4 mm socketed terminals.

The coil fits onto a double ‘C’ core, provides a suitable transformer for operation from a low voltage AC supply. In addition, it provides a useful electromagnet if used on one half of a ‘C’ core.

A contact arm & three metal studs mounted on a bakelite base with three brass terminals. The centre terminal is common connection to the arm & the other two terminals connected to the other studs.

Spring loaded serrated jaws, clamping screw for wire, wires may also be soldered. Insulated 4mm sockets.
a) Black b) Red.

A simple dynamo model to differentiate AC from DC. Mounted on a wooden base. Two bulbs are provided for AC & DC current(s). The model is hand driven & when operated, the AC bulb shows flickering light to indicate AC current while the other bulb glows fully indicating DC current.

A simple demonstration of a Dynamo Model mounted on a wooden base. Hand driven by a gear. Simplified open frame construction which can be readily understood without detriments to its essential similarity to real machine. A 2 pole armature wound by enamelled copper wire to rotate in U shape magnet in pivot. While in rotation process through the gear wheel by hand, the bulb provided glows.

Moving coil type. Basic sensitivity of meter is 5mA, 100mV f.s.d. The meters can be used to demonstrate the working principle of AC or DC ammeters or voltmeters with interchangeable dials. Different dials are available. Housed in a Plastic/Wooden case, with plastic in front and rear.
a) Wooden case b) Plastic case.

Laminated core to form a roughly rectangular core 92 x 56 x 20 mm approx. With a cross section of 20 x 12 mm & is cut across the middle to produce 2 equal ‘C’s. A strong spring steel strip is provided to hold the two halves together.