Electricity and magnetism Introductory lesson VA PS 9

Electricity and Magnetism

What are they? What are the different forms? How are they alike and how are they different?

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​Law of Conservation of Charge

​The total amount of electrical charge doesn't change. When subatomic particles are created, they are created in pairs: a negative and a positive.

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Multiple Choice

According to this law, a charge can be transferred from object to object, but it cannot be created or destroyed. 

• Law of Conservation of Energy 
• Newton's Third Law 
• Law of Conservation of Charge
• Ohm's Law

​Electricity is...

​Electricity is generated when electrons flow between atoms. Electricity is the flow of electrons found naturally in nature and in people.

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Poll

What is electricity?

• An invisible force that we don't understand.

• An invisible force that relies on the movement of electrons.

• A force that can be used for human activities.

​Static electricity is...

​Static electricity is a form of electricity produced when electrons build up and are given off.

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​What are electrons?

Multiple Choice

The accumulation of excess electric charge on an object is called

• Static electricity 
• Electric discharge
• Resistance
• Circuit 

Multiple Choice

Which particle has a positive charge in an  atom?

• proton

• neutron

• electron

Multiple Choice

Which particle has a neutral charge in an  atom?

• proton

• neutron

• electron

Multiple Choice

Which particle has a negative charge in an  atom?

• proton

• neutron

• electron

​What is magnetism?

​Magnetism occurs because items that are electrified. It's an invisible force due to electric charges.

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​Magnetism only occurs between objects made of certain materials.

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​Magnets can either be permanent or temporary electromagnets.

​Electricity and magnetism are similar...

​-they both occur from the movement of electrons.

​-magnetic fields can produce electrical currents in conductors

​- electricity can produce a magnetic field and cause steel and iron to act like magnets.

Magnet

A magnet is a material or object that produces a magnetic field. This magnetic field is invisible but is responsible for the most notable property of a magnet: a force that pulls on other magnetic materials, such as iron, and attracts or repels other magnets.

Multiple Choice

When two magnets attract, they ______________

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

Multiple Choice

When two magnets repel, they ________________

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

Multiple Choice

A north pole and a south pole will attract each other.

• True

• False

Multiple Choice

What will happen when these magnets are brought close together?

• They will attract each other.

• They will repel each other.

• Both the magnets will turn to the left.

• Both the magnets will turn to the right.