Electromagnetism Answers

resistancevoltage✔ current conductivity

growing ✔ moving steaming

Which object represents an uncharged molecule?

The weakest push or pull on a charged particle at a distance from the magnet:

⇒ 80

⇒ 7.5

How does the current in a circuit change if the resistance is doubled?

⇒ 3

Keep the voltage the same.Decrease the voltage.✔ Increase the voltage.

Which equation is correct according to Ohm’s law?

If a magnet is broken into two pieces, what happens to the magnetic poles?

Maglev trains use magnets on the train and guideway to levitate the train off the track. The north pole of the magnets on the train must face the

Three magnets are placed on a plastic stick as shown in the image. Explain how the magnets need to be rearranged so that they stick together and why rearranging them this way allows them to stick together.

Use the drop-down menu to complete the statement about Earth’s magnetism. Earth’s magnetic field is generated in the core, which is made of that is constantly .

Why does a compass point toward Earth’s geographic North Pole? Select three options.Earth’s geographic North Pole is close to the magnetic north pole.Earth’s geographic North Pole is close to the magnetic south pole.Magnets allowed to move freely align themselves to point north.The north pole on a compass is attracted to Earth’s magnetic north pole.The north pole on a compass is attracted to Earth’s magnetic south pole.

Which factors affect the strength of an electromagnet? Check all that apply. the direction of the current flowing through the wirethe amount of current flowing through the wirethe number of coils in the wirethe material of the wirethe material of the core

decreases✔ increasesdoes not change

Nineteenth century English scientist Michael Faraday found that if he moved a magnet through a loop of wire, an electric current flowed in that wire.What process did Faraday discover?

a wire coilan iron bar✔ a magnet

Which object represents a negatively charged particle?