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