Electrical Transformers

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.

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

• step down

• step up

Tags

NGSS.HS-PS3-3

Power Station--->________--->National Grid Network---> Main Substation--->Branch Substation

Tags

NGSS.HS-PS3-3

What is a transformer?

• The national grid

• Revolving machine with blades that turns a generator

• A device used to increase or decrease voltage

• A Device that converts kinetic energy into electrical energy

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-3

NGSS.HS-PS3-5

What do we call a transformer that increases voltage (and decreases current)?

• Step-up transformer

• Step-down transformer

What type of transformer is this?

• Step-up

• Step-down

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-3

What is happening at stage 4 in the diagram?

• fuel is burned to boil water to make steam

• steam makes a turbine spin

• the spinning turbine turns a generator which produces electricity

• the electricity goes to the transformers to produce the correct voltage

Tags

NGSS.HS-PS3-4

What do we call a transformer that decreases voltage (and increases current)?

• Step-up transformer

• Step-down transformer

What type of transformer is this?

• Step-up

• Step-down

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

Step-up transformers have more coils on which coil?

• Primary coil

• Secondary coil