WorksheetsBS II - Quiz 1
Total questions: 20
Worksheet time: 15mins
1. These energy sources are non-renewable, except
Nuclear
Biomass
Natural Gas
Petroleum
1. Complete the energy changes for hydroelectric power station :
_ --> --> electrical energy.
kinetic energy, gravitational potential energy
gravitational potential energy, kinetic energy
gravitational potential energy, chemical energy
kinetic energy, heat energy
State the type of current supplied by power supply
(a)
Thermal Energy has to do with.......
motion
light
electric current
heat
Geysers and volcanoes are examples of .......
hydropower
natural gas
geothermal
biomass
Why is Alternating current used instead of direct current in the transmission of electricity through long distance ?
Only A C can flow through the cables
A C voltage can be stepped up or stepped down by using transformers.
Most of the electrical appliances work only with A C.
Generating direct current is more complicated than generating A C.
The function of transformer in transmission of electricity is to
increase the resistance
change the voltage
reduce the time to transmit the electricity.
increase the power.
Transformers ........................ voltage for use in homes.
step down
step up
Electricity is sent over ______________ transmission lines.
low voltage
no voltage
high voltage
none of the above
Fill in the flow chart.
Power Station -> (a) -> National Grid Network -> Main Substation -> Branch Substation.
the main supply of electrical energy in a house has a voltage of ________
33kV
11kV
415 V
240 V
The __________ enables electricity to be transmitted to the branch substation when needed.
Switch zone
National Grid Network
Transformer
Circuit Breaker.
The voltage of the alternating current is highest at the ______
Power Station
National Grid Network
Branch Substation
None of the above
The power loss can be reduced by :
reducing the resistance of the cables
reducing the current in the cable
reducing the voltage in the cable
increasing the voltage in the current.
(a) energy are energy sources that cannot be replaced and will finally be used up.
The biomass produces methane that boils water into steam to rotate the turbine. The turbine rotates the generators to produce electricity.
Wind energy power station
Hydroelectric power station
Biomass power station
Nuclear energy power station
Water from a dam rotates a turbine. The turbine rotates the generators to produce electrical energy.
Biomass power station
Thermal power station
Hydroelectric power station
Wind energy power station
The solar panel absorbs light energy directly from the Sun and converts it into electrical energy.
Wind energy power station
Nuclear energy power station
Wave energy power station
Solar energy power station
The nuclear fission (reaction) of uranium in a nuclear reactor is used to boil water to produce steam which rotates the turbine. The turbine rotates the generators to produce electrical energy.
Wind energy power station
Nuclear energy power station
Wave energy power station
Solar energy power station
Electricity is supplied to homes in the form of
Alternating Current
Direct Current
