Generation of Energy(Transformer) Cikgu Sakinah

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

• power station

• petrol station

• power source

• source of energy

Generators normally produce...

• Alternating current

• Direct current

Step-up transformers...

• increase the voltage

• decrease the voltage

Transformer are used to raise the voltage along substations and lower it for residential consumption. What kind of transformer are used to raise the voltage?

• step-up

• step-down

• neither of the two

• both

Transformers on distribution poles .............. voltage for use in homes.

• step down

• step up

• step right

• step left

If the current is transmitted at high voltage...

• less energy is lost

• more energy is lost

• it produces alternating current

• underground cables are used

What form of energy is being converted to electrical energy with this bike?

• light

• motion

• sound

• heat

Renewable energy sources can best be defined as

• resources that will regenerate in a million or more years

• resources that will regenerate in a generation or less

• resources that will regenerate in 10-20 million years

• resources that do not have the ability to regenerate

What is the advantage of electricity transmission at high voltage?

• Increase the energy

• High current flow

• Reduce the heat dissipated in the electrical cable

• Reduce the resistance of transmission cable

Calculate the voltage for secondary circuit

• 12.5 V

• 25 V

• 50 V

• 100 V