Physics 8 - Review on Magnets

What tool is commonly used to determine the direction of a magnetic field?

• Ruler

• Compass

• Protractor

• Thermometer

How does a compass needle behave when placed near a bar magnet?

• It points toward the north pole of the Earth

• It aligns itself with the magnetic field lines

• It points away from the magnet

• It spins randomly

What is observed when iron filings are sprinkled around a bar magnet?

• They scatter randomly

• They align themselves in a pattern along the magnetic field lines

• They form a circle around the magnet

• They do not react

In which direction do magnetic field lines point outside of a bar magnet?

• From the north pole to the south pole

• From the south pole to the north pole

• In a straight line from the center

• In random directions

What happens when two like poles of a magnet are brought close together?

• They attract each other

• They repel each other

• They combine to form a stronger magnet

• They have no effect on each other

What occurs when opposite poles of two magnets are placed near each other?

• They repel each other

• They attract each other

• They spin around

• They cancel each other out

How can you visually represent the interaction between two like magnetic poles?

• By drawing lines curving away from each other

• By drawing lines curving toward each other

• By drawing a straight line between the poles

• By shading the area between the poles

What pattern is formed when two opposite poles are placed near each other?

• Magnetic field lines curve toward each other and connect

• Magnetic field lines curve away from each other

• There is no pattern

• The field lines are parallel and straight

Which of the following is necessary to create an electromagnet?

• A permanent magnet

• A battery, a coil of wire, and an iron core

• A bar magnet and a wire

• A piece of wood and a wire

What happens when an electric current passes through a wire wrapped around an iron core?

• The iron core becomes magnetized

• The iron core melts

• The iron core conducts electricity

• The iron core loses its magnetism