Class XII
1.
To test whether the supply is A.C. or D.C. – Principle of testing and
circuits.
Practical – To test the supply if A.C. / D.C.
2.
Conversion of A.C. into D.C. – Concept of rectification. Half wave
and full wave rectifiers with filter circuits.
Practical – Assembling of an eliminator.
3. Electrical Motors -
a. What is a motor. P, basic principle, working, general construction.
b. Types of motors – A.C. / D.C.
c. Types of A.C. motors – Induction / Series motor (Universal).
d. Faults and testing of motors.
e. Minor repairing of a motor.
4. To study construction, testing, dismantling and reassembling of the
following appliances having Induction motor –
a. Table fan
b. Ceiling fan
c. Exhaust fan
d. Room cooler
e. Heat convector
5. To study the construction, testing, dismantling and reassembling
of following appliances having D.C motors / Universal motors.
a. Tape recorder
b. Hair Dryer
c. Hand mixer grinder
d. Food processor
6. Working, principle of fans, regulator.
Practical – To study parts of fans and regulator, testing and
repairs.
7. To study the construction, testing, dismantling and reassembling
of following appliances having A.C. series motor -
a. Cooler pump (shaded pole)
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