Magnets and Electromagnets - MCQs (Grade 7-8)

What is a magnet?

• A device that produces electricity

• A material that produces a magnetic field

• A battery that powers circuits

• A switch that controls current

Which of the following materials is attracted by magnets?

• Plastic

• Wood

• Iron

• Paper

Which magnet is always magnetic?

• Temporary magnet

• Electromagnet

• Permanent magnet

• Bar magnet when connected to a battery

What makes an electromagnet work?

• Sunlight

• Heat

• Electric current

• Sound waves

What happens to an electromagnet when electricity is turned off?

• It becomes stronger

• It stops being magnetic

• It keeps attracting metal

• It breaks

Which of these can increase the strength of an electromagnet?

• Fewer wire turns

• Using less current

• Adding more coils around the core

• Using a wooden core

What do we call the invisible lines around a magnet showing its force?

• Electric waves

• Magnetic field lines

• Sound waves

• Gravity lines

Which switch is used to control the current in the electromagnet circuit?

• Light switch

• Push-button switch

• Fan regulator

• Remote switch

Where are electromagnets used in real life?

• Cranes and door locks

• Ice cream machines

• Balloons

• Shoes