Electromagnetism Review

Electromagnetism Review

Get ready for the Quiz!

Electricity and Magnetism are Connected!

Electricity and Magnetism are two sides to the same coin!

Multiple Choice

A force that can act at a distance is called

• non contact force

• friction

• balanced

Multiple Choice

Electric current can flow through a wire only if it forms a ____

• Open Loop

• Closed Loop

Multiple Choice

All electric charge is based on the ___________ in atoms.

• Protons and Electrons

• Protons and Neutrons

• Neutrons and Protons

• Neutrons and Electrons

Multiple Choice

The strength of an electric force depends on the ___________ of electric charge on the particles and the ______________ between them.

• Amount; distance

• Size; distance

• Type; attraction

Multiple Choice

All magnets have 2

• fields
• colors
• poles
• all of the above

Multiple Choice

What does magnets repelling mean?

• Magnets move away from each other

• Magnets do not have magnetism

• Magnets move towards each other

Multiple Choice

_{^{The magnet's shown will}}

• not move
• attract
• repel
• all of the above

Multiple Choice

The area around a magnet is called the .....

• attraction zone

• work area

• magnetic field

• hot zone

Multiple Choice

Earth's magnetic South Pole is near Earth's geographic North Pole

• true

• false

Multiple Choice

Earth has a magnetic field that is similar to a bar magnet's magnetic field.

• true

• false

Multiple Choice

What do we know about Earth's Magnetic Field?

• It is likely caused my the molten iron core of the Earth.

• It protects us from solar winds.

• It causes the auroras.

• It does not deflect particles that move parallel to the field lines.

• all of the above.

Multiple Choice

Which dude discovered that current in a wire caused a

deflection in a magnetic compass?

• Tesla

• Faraday

• Maxwell

• Oersted

Multiple Choice

Electromagnetism is a magnetism produced by an electric current.

• True

• False

Electromagnets

How are they made and how can they be made stronger?

Multiple Choice

Bob made an electromagnet but it was very weak.  How can he make it stronger?

• take away a d-cell
• wrap the wire loosely
• use thicker wire
• use less winds

Multiple Select

Permanent Magnets and Electromagnets are similar in which TWO ways?

• it can be turned off and on

• they both have a north and south pole

• they are surrounded by a magnetic field

Multiple Choice

The electromagnetic forces from a current carrying wire are strong enough to move the compass needle. The forces can be made stronger by

• making the wire shorter

• making the wire longer

• making the wire into loops

Multiple Select

What THREE ways are electromagnets different from permanent magnets?

• they can be turned off and on

• they can increase in strength by increasing the current in the wire

• they are smaller in size

• they can change which is the north and south pole

Multiple Choice

An electromagnet is a magnet that

• its strength can be varied and turned on and off

• always has a magnetic field around it

• has very little strength

Multiple Choice

Which component provides the stored energy to run the electromagnet?

• d cell
• core
• coil
• wire

Multiple Choice

Which component controls the flow of electricity by opening and closing the circuit?

• switch
• d cell
• wire coil
• core

Multiple Choice

What component provides the pathway to carry electricity from component to component?

• d cell
• wire
• switch
• wire coil

Multiple Choice

What component becomes a temporary magnet when electricity is flowing through the circuit?

• d -cell
• wire coil
• switch
• core

Motors and Generators

Know the difference!

Multiple Choice

What two forces are required for generators and electric motors to work? 

• magnetism and thermal 
• electricity and thermal 
• electricity and magnetism 
• magnetism and radiant 

Multiple Choice

What did Faraday discover about Induction?

• That a changing magnetic field induces a current in a conductor.

• That electricity and magnetism were related when he noticed a current carrying conductor deflected the compass of a needle.

• That the Earth's magnetosphere deflected charged particles from the sun known as solar winds.

• That alternating current could be manipulated with transformers.

Multiple Choice

Motors are devices that convert _____ energy into _____ energy.

• chemical; mechanical

• mechanical; electrical

• electrical; mechanical

• potential; kinetic

Multiple Choice

This picture is an example of a ___________

• Step- Up Transformer
• Step- Down Transformer
• Motor
• Generator

Multiple Select

Choose all of the motors.

Multiple Choice

Generators are devices that convert _____ energy into _____ energy.

• chemical; mechanical
• mechanical; electrical
• electrical; mechanical
• potential; kinetic

Multiple Select

Choose all of the generators

Multiple Choice

A transformer actually transforms

• voltage

• magnetic field lines

• generators into motors

Multiple Select

Choose all of the transformers.

Multiple Choice

Which best describes how a motor works?

• When a fan blows on a wire, it causes it to spin, creating a force.

• When a fan blows on a wire, it causes it to spin, creating an electrical current.

• When a wire that carries electrical current is placed in zero gravity, the wire experiences a force.

• When a wire that carries electrical current is placed in a magnetic field, the wire experiences a force.

Multiple Choice

What is produced by moving a permanent magnet through a coil of copper wire?

• electricity

• electromagnet

• light

• sound

Multiple Choice

In an electric motor, the energy transformation begins as  ----

• electrical and becomes chemical
• mechanical and becomes electrical
• electrical and becomes mechanical
• mechanical and becomes chemical

Multiple Choice

What type of energy comes OUT of a generator?

• Mechanical
• Electrical
• Thermal
• Potential

Multiple Choice

What energy do you put IN to a generator?

• Mechanical
• Electrical
• Thermal
• Potential

Multiple Choice

Generators are devices that convert _____ energy into _____ energy.

• chemical; mechanical
• mechanical; electrical
• electrical; mechanical
• potential; kinetic

Generating Electricity

How we transform electricity!

Multiple Choice

What is the first step to generating electricity?

• Creation of steam

• Finding the coal

• Hiring employees

Multiple Choice

Super heated steam is used to turn a ______________?

• Transformer

• Battery

• Turbine

• Toothed Gear

Multiple Choice

Geothermal energy is energy from 

• the sun
• heat from deep in the earth
• wind
• inexhaustable

Multiple Choice

What is created by the boilers at the power plant?

• Smoke

• Steam

• Pollution

Multiple Choice

95% of all electricity is produced from this mechanical device

• a motor
• the power station
• a turbine and magnet generator
• a transmission line

Multiple Choice

Which is the BEST definition for hydroelectricity

• energy from water
• electricity from  water
• electricity generated from moving water
• moving water that creates energy

Multiple Choice

The function of a step-down transformer is..

• to increase the voltage to reduce current to make the heating effect smaller
• To decrease voltage for safety
• To store excess energy and release it when necessary

Multiple Choice

Fill in the blank:

• Transmission Lines

• Step Down Transformer

• Home

• Power box

Multiple Choice

The parts of the national grid are

• furnace-boiler - turbine-generator-
• Power station - step up transformer- Grid - Step down transformer - consumers
• furnace-boiler - generator-turbine-

Multiple Choice

The function of a step-up transformer is..

• to increase the voltage to reduce current to make the heating effect smaller
• To decrease voltage for safety
• To store excess energy and release it when necessary