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A value of 33,000 volts is equivalent to:
If the load in the circuit below is short-circuited, the circuit current will:
Opening the switch in the circuit below will cause:
Closing the switch in the circuit below will cause:
Match the symbols labelled ‘A’ to ‘D’ in the circuit diagram below with their name and purpose as listed in the table.
Name and Purpose | Letter |
Lamp – functions as the circuit load. | |
Energy source – supplies power to the circuit. | |
Switch – controls availability of power to the load. | |
Fuse – protects the circuit against overcurrent. |
If an electric welding machine takes a current of 40 amperes for 15 seconds, what quantity of electricity is transported to the welder?
Q=
Match the loads below with the options provided to indicate how electricity is utilised in each case.
Appliance | Uses electricity to produce |
Electric motor: |
|
Electric radiator: |
|
LED lamp: |
|
Match the loads below with the options provided to indicate how electricity is utilised in each case.
Appliance | Uses electricity to produce |
Electric motor: |
|
Electric radiator: |
|
LED lamp: |
|
In NSW, the distribution cables from a zone substation to the supply transformers in the street usually operate at a voltage of:
Transmission of electricity from a power station to the distribution network is done at very high voltages to:
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