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