Electromagnetism Review

Electromagnetism Review

What is Electricity?

• It is the presence and motion of matter that has a property of electric charge.

• Electricity is related to magnetism, both being part of the phenomenon of electromagnetism

Two types of electricity

• Static ElectrIcity-is an imbalance of electric charges within or on the surface of a material. The charge remains until it is able to move away by means of an electric current or electrical discharge.

• Current Electricity-An electric current is a stream of charged particles, such as electrons or ions, moving through an electrical conductor or space.

What is Magnetism?

• It is a class of physical attributes that are mediated by magnetic fields.

• Electric currents and the magnetic moments of elementary particles give rise to a magnetic field, which acts on other currents and magnetic moments.

• Spinning magnets produces electric charge.

• Magnetism is one aspect of the combined phenomenon of electromagnetism

What is electromagnetism?

• Is a process where a magnetic field is created by introducing the current in the conductor.

• When a conductor is electrically charged it generates magnetic lines of force of conductor.

• Electric current current produces magnetic fields, while spinning magnets produces electric charges. Due to this electricity and magnetism are related

• When you combine electricity and magnetism you get electromagnetism

What is Maglev train?

• Maglev is short for (magnetic levitation)

• it is a system of train transportation that uses two sets of magnets:

• one set to repel and push the train up off the track, and another set to move the elevated train ahead, taking advantage of the lack of friction.

• It move up to 300 miles per hour! It can travel from Brooklyn to Bronx nonstop in 5 Minutes.

Multiple Choice

What 3 things does a circuit need for current to flow?

• energy source, energy user, wires

• energy source, switch, wires

• energy source, energy user, switch

• energy user, switch, wires

Multiple Choice

What are the two types of electricity?

• Static and electrons

• Current and voltage

• Series and parallel

• Static and current

Multiple Choice

In a series circuit, what will happen if the path for the electrical current is broken by a burned out bulb?

• The electrical current will stop fllowing and none of the bulbs will light up.

• The electrical current will continue flowing and the other bulbs will light up.

• The energy source will continue to move the electric charge through the circuit.

Multiple Choice

Which of these materials is a good insulator?

• gold

• copper

• silver

• plastic

Multiple Choice

What is created when a magnet moves through a coil of wire?

• A. an electromagnet
• B. a ferromagnet
• C. a solenoid
• D. an electric current

Multiple Choice

The process of creating a current in a circuit by changing a magnetic field

• A. electric generator
• B. electric motor
• C. electromagnetic induction
• D. magnet

Multiple Choice

A device that converts mechanical energy into electrical energy

• A. electric generator
• B. electric motor
• C. electromagnetic induction
• D. electric generator

Multiple Choice

A device that converts electrical energy into mechanical energy

• A. electromagnet
• B. electromagnetic induction
• C. electric motor
• D. electromagnetism

Multiple Choice

As electrons move, they make

• A. electromagnetism.
• B. auroras.
• C. ferromagnetism.
• D. magnetic fields.

Multiple Choice

What would we call a nail that can pick up a paperclip because it is touching a magnet?

• temporary magnet
• poles
• force
• detector

Multiple Choice

Magnets have a north and a south ___________

• shape
• color
• pole
• region

Multiple Choice

When two magnets repel, they ________________

• change color
• pull together
• push apart
• get colder

Multiple Choice

When two magnets attract, they ______________

• push apart
• change color
• get colder
• pull together

Multiple Choice

The flow of electricity in a circuit-

• current

• flow

• circuit

Multiple Choice

The flow of electricity in a circuit-

• current
• flow
• circuit

Multiple Choice

What is the fastest type of train in the world?

• Conventional

• Freight

• Maglev

• Steam

Multiple Select

What are the advantages of a MagLev train over a traditional train?

• Faster

• Quieter

• Louder

• Slower

Multiple Select

What materials would you need to make your own Maglev? (select all that apply)

• wooden block

• magnetic strips

• plastic barriers

• paper clips

• wires

Multiple Choice

What does "maglev" mean?

• magnetic fields

• magnetic levitation

• magazine levers

• magnetic levels

Multiple Choice

How does a MagLev train work?

• Powered by coal

• Powered by steam

• Levitates from the same magnet poles

• Levitates from opposite magnet poles