400V
c. explain the action and state one application for solenoid. List five materials which are used good conductors the
electrotechnical industry. 230V
b. 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.
27. supply for the National Grid
rather than d.
25. Describe the three effects electric current. Describe the advantage using a. supply.
. around simple bar magnet
b.
21.c.
29. Sketch the construction simple transformer and label the primary
and secondary windings.c.
20.121
U W
6 6
2 2
C1
L1 C1
2
C3
4
5
6
To phase supply
To phase motor
18. Describe with the aid simple diagram how the atoms and electrons
behave material said good conductor electricity. 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. Why the metal core the transformer
laminated? How cool big power transformer?
28.
30.
26.
23.
24.
22. Sketch simple circuit two resistors connected series across a
battery and explain how the current flows this circuit. List five practical applications for transformer for example, shaver
socket. horseshoe magnet
c. Sketch simple circuit show how voltmeter and ammeter would be
connected into the circuit measure total voltage and total current. 132kV.
19. 25kV
d. Sketch the magnetic flux patterns:
a
