SB1 L093 Using Electromagnets

What happens when like poles of a magnet are near each other?

• Attract

• Repel

What is the direction of a magnetic field?

• South to North

• North to South

What is the significance of the direction of magnetic field lines?

• It shows the direction of magnetic force

• It indicates the strength of the field

What is the relationship between a relay and an electromagnet?

• A relay works using an electromagnet

• A relay is powered by solar energy

Electromagnets are used in which of the following devices?

• Speakers

• Bicycles

Electromagnets are used in which of the following household items?

• Phones

• Lamps

What is used in scrapyards to pick up iron and steel scrap?

• Electromagnets

• Permanent magnets

Which part of the school bell is responsible for hitting the gong?

• Striker

• Electromagnet

What repeats in the bell mechanism to keep it ringing?

• The striker springs back and reconnects the circuit.

• The battery recharges.

What is the result of the striker hitting the bell?

• The bell rings.

• The bell stops ringing.