Generating electricity and the national grid

The parts of the national grid are

• furnace-boiler - turbine-generator-
• Power station - step up transformer- Grid - Step down transformer - consumers
• furnace-boiler - generator-turbine-

The function of a step-up transformer is..

• to increase the voltage to reduce current to make the heating effect smaller
• To decrease voltage for safety
• To store excess energy and release it when necessary

The function of a step-down transformer is..

• to increase the voltage to reduce current to make the heating effect smaller
• To decrease voltage for safety
• To store excess energy and release it when necessary

How does the national grid ensure a reliable supply of electricity

• Excess energy is stored in HEP and released when necessary
• to increase the voltage to reduce current to make the heating effect smaller
• To decrease voltage for safety

The nergy resources that are reliable are….

• Coal, OIl, Gas, Nuclear, Geothermal, HEP
• Wind and solar
• Coal, OIl, Gas, Nuclear
• Nuclear

The non-renewable energy resources are…

• Geothermal, wave, wind, solar, tidal, HEP, Biofuels
• Coal, OIl, Gas, Nuclear
• Powerstations
• Step-up and step-down transformers

The order of a fossil fuel power station are…

• furnace-boiler - turbine-generator-
• Power station - step up transformer- Grid - Step down transformer - consumers
• furnace-boiler - generator-turbine-

Why is alternating current used instead of direct current in the transmission of electricity through long distances?

• Only alternating current can flow through the cables.

• Alternating current voltage can be stepped up or stepped down by using transformers.

• Most of the electrical appliances work only with alternating current.

• Generating direct current is more complicated than generating alternating current.

Electricity is generated at a .......

• power station

• petrol station

• power source

• source of energy

Transformers .............. voltage for use in homes.

• step down

• step up