Electrical Transformer Quiz

What happens when an electric current passes through a long, hollow coil of wire?

• Strong electric field inside the coil and weaker field outside it

• Strong magnetic field inside the coil and weaker field outside it

• No change in the magnetic field inside the coil

• Strong magnetic field outside the coil and weaker field inside it

What is the iron core of a transformer typically made of?

• Gold

• Steel

• Copper

• Aluminum

What is the primary coil connected to in a transformer?

• Source of electrical current

• Magnetic field

• Secondary coil

• Load

How are the primary and secondary coils connected in a transformer?

• Through air

• Electrically

• Not connected

• Through the iron core

What carries the changes in magnetisation from one coil to the other in a transformer?

• Aluminum wire

• Iron core

• Copper wire

• Steel core