c. Using ammeter
7. Description of domestic electric supply – Its specification voltage,
current, capacity, number of wires, number of phases, frequency.
8. Heating effect of current – Its formula and demonstration,
calculation of electricity energy consumption and commercial unit
of energy, idea of electricity bill.
9. Identification of different feeding wires in domestic supply –
significance of earthing and its system, testing of earth connection
in socket.
10. Construction of a test lamp and heater / electric iron cord, using
earthing.
11. Testing of simple appliances – Heater, Non-auto iron, Non-auto
oven, Non-auto toaster.
12. To dismantle and assemble the following electrical accessories –
bed switch, push button switch, batten holder, angle holder, 3 pin
plug, two / three pin socket.
13. Different types of Circuits – Open and closed, normal and short
resistance of various types of circuits.
14. Series testing board – Working, use and construction.
Class X
1. Introduction, use, type (based on working / construction)
connections of – Amperemeter, voltmeter and wattmeter.
2. Making a simple moving coil ammeter, locating and repairing faults.
3. Fuse Wire – selection, type, testing whether the fuse is ‘in’ or
blown, replacement of fuse wire.
4. a. Introduction to multimeter and method of its uses.
b. Testing of electrical appliances using multimeter.
5. Principle of fault location and demonstration using multimeter.
6. To dismantle and assemble the electrical appliances -
Heater, kettle, immersion rod, hot plate, toaster, electric iron,
geyser.
7. To find the fault in above electrical appliances and rectify them.
8. Construction of simple electric motor to run a fan.
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