BS II - Quiz 1

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

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 -> ____________ -> National Grid Network -> Main Substation -> Branch Substation.