List five materials which are used good conductors the
electrotechnical industry.
29. horseshoe magnet
c. around simple bar magnet
b. supply.
27. Describe the three effects electric current.
20. Sketch the construction simple transformer and label the primary
and secondary windings. Describe the advantage using a.
22. Describe with the aid simple diagram how the atoms and electrons
behave material said good conductor electricity. 25kV
d. Describe, with the aid simple diagram, how the atoms and
electrons behave material said good insulator. 400V
c. List five materials which are used good insulators the
electrotechnical industry. 230V
b.
. Sketch simple circuit show how voltmeter and ammeter would be
connected into the circuit measure total voltage and total current. List five practical applications for transformer for example, shaver
socket.
23.c. supply for the National Grid
rather than d.
19.
26.
30.
21.
25. 132kV. Electricity distributed the National Grid at:
a. Sketch simple circuit two resistors connected parallel across a
battery and explain how the current flows this circuit. Sketch simple circuit two resistors connected series across a
battery and explain how the current flows this circuit. Sketch the magnetic flux patterns:
a. explain the action and state one application for solenoid.
24. Why the metal core the transformer
laminated? How cool big power transformer?
28.c.121
U W
6 6
2 2
C1
L1 C1
2
C3
4
5
6
To phase supply
To phase motor
18
