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WorksheetsElectricity and magnetism
Total questions: 10
Worksheet time: 15mins
Which power station uses firewood as the energy source?
Nuclear
Biomass
Thermal
Hydroelectric
The following are the examples of non renewable energy except .......
Coal
Petroleum
Natural gas
Tidal
What are the energy changes that occur in the thermal power station?
Nuclear energy --> Heat energy --> Kinetic energy --> Electrical energy
Potential energy --> Kinetic energy --> Electrical energy
Chemical energy --> Heat energy --> Kinetic energy --> Electrical energy
Kinetic energy --> Electrical energy
Generation of electrical energy in a generator is based on .....
Movement of the wire
Movement of the generator
Movement of the transformer
Movement of the magnet
(a) is a device used to display and measure the shape of graph, direction of current and voltage changes.
The diagram shows the (a)
An oven has been labelled with 3.5 kW, 240 V. What is the appropriate value of fuse for the oven?
Given : P (Power) = V (Voltage) x I (Current)
10 A
13 A
15 A
30 A
Diagram shows a 3 pin plug. What is the function of earth wire?
Returns the current from homes to substations
Records the amount of electrical energy that has been used
Connects an appliance directly to earth as a safety measure
Carries current at a voltage of 240V from the local substation to home
What is the energy efficiency of thr CFL bulb which has the input energy with 7 J and output energy with 4.8 J? Your answer must be in percentage (%)
(a)
Syazana irons her shirt with an electric iron marked 3 kW, 240 V for 10 minutes. What is the cost of electrical energy used if the rate is RM0.25 per unit?
RM0.213
RM0.128
RM0.245
RM0.125
