Magnetisim Unit 8 Flashcards
What will happen to the force of 2 magnets if they are pulled farther apart?
The force would be weaker
What would happen if a metal paper clip touches a nail?
The paper clip would stick to the nail
At which location is the magnet strongest?
4
Look at the 2 magnets above. If you push them towards each other, the magnets will…
Be pulled towards each other
The pieces of scrap iron are attracted to the metal disk. The metal disk is most likely functioning as which of the following?
An electromagnet
A student places a magnet above another magnet on a pole. Why does the top magnet appear to float above the bottom magnet?
The like poles of the magnets repel each other
The needle of the compass points toward the magnetic north pole of Earth. What would cause the needle of the compass to point east?
An electrical current
How do electrically charged objects affect neutral objects when they come in contact?
Electrons move from negatively charged objects to neutral objects.
A copper wire with a plastic coating is placed near a compass, as shown in the figure. When both ends of the wire are connected to a battery as shown in the other figure, the compass needle moves. Why?
Electricity flows through the wire, producing magnetic force.
Why does the compass needle move when the compass is placed near the wire?
Because electric current produces magnetic forces.
Which of the following diagrams correctly demonstrates the magnetic fields around a bar magnet?
B
doorbell contains a simple electromagnet. Which change would most likely increase the strength of an electromagnet?
A larger power source
Which pair of items will repel each other?
A negatively charged plastic strip and a negatively charged piece of cloth
How can a permanent magnet make the light bulb glow?
The motion changes the magnetic field which causes electrons to move in the wire.
