Electromagnet Motors Generators

In an electric generator, the energy transformation begins as ----

• electrical and becomes chemical

• mechanical and becomes electrical

• electrical and becomes mechanical

• mechanical and becomes chemical

Which of these is NOT an example of an electromagnet?

• Computer

• Speakers

• Whiteboard

• Doorbell

In an electric motor, the energy transformation begins as  ----

• electrical and becomes chemical

• mechanical and becomes electrical

• electrical and becomes mechanical

• mechanical and becomes chemical

Which of these pairs of devices operate in reverse of each other?

• generator and motor

• generator and electromagnet

• motor and electromagnet

• electromagnet and resistor

A coil of wire with a current is called 

• spring

• solenoids

• magnet

• current

Generators = _______________ (from motion)

• electromagnetism

• electricity

• magnetism

• motion

What is an advantage of electromagnets?

• They can be turned on and off.

• They are very strong.

• They can pick up heavy objects like cars.

• All of the above.

He was credited for his discovery of electromagnetic induction.

• Thomas Edison

• Benjamin Franklin

• Nikola Tesla

• Michael Faraday

What is an electromagnet?

• temporary magnet made from current carrying wire around a magnetic metal core.

• permanent magnet with a north and south pole

The image shows pieces of scrap iron being picked up by a metal disk hanging from a crane. The pieces of scrap iron are attracted to the metal disk. The metal disk is most likely functioning as which of the following?

• battery

• an engine

• an insulator

• an electromagnet