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