Electricity 1.2.6

• ​construct a model of an electric field

• relate electricity to forces

Page 17 in your Notebook

​Electricity 1.2.6

​Let's go to a sandbox!

Wire Corona

Occurring on powerlines, these bright lights called Wire Corona may be caused by static buildup on nearby towers and lines and may provide an explanation for the number of “UFO” sightings in these areas.


Corona discharge can cause an audible hissing or cracking noise as it ionizes the air around the conductors. This is common in high-voltage electric power transmission lines. The corona effect can also produce a violet glow, the production of ozone gas around the conductor, radio interference, and electrical power loss.

https://www.electrical4u.com/corona-effect-in-power-system/#google_vignette

Word Cloud

What have you used to day that has required electricity?

Open Ended

Knifefish use electricity to locate food, recognize other fish, and find their way in the dark. What would you do if you had a similar sense?

A form of energy that results from charged particles. Like poles on a magnet, charged particles cause attraction and repulsion. The forces caused by electricity are primarily the result of charged particles called electrons.

Electricity

​positive and negative

​Usually, an atom has equal numbers of protons and electrons, so the overall charge of the atom remains neutral, or zero. However, sometimes electrons transfer to other atoms, causing the charge to change.



the atom that loses electrons becomes positively charged; and

the atom that gains electrons becomes negatively charged.

​Electrical Force

An electrical force is the attraction or repulsion between charged objects. Like magnetism, electricity can affect objects that do not touch each other. An electrical force can be:

• attractive

• repulsive

Whether electricity creates attraction or repulsion depends on the charges present. The phrase opposites attract applies to electric charges.

Draw

Circle the ones that would ATTRACT.

Draw a star beside the ones that would REPEL.

Drag and Drop

Like charges ​

Placeholder

and opposite charges ​

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.

Drag these tiles and drop them in the correct blank above

repel

attract

Play Video in Edio on Slide 4

Draw

Depesh rubbed a balloon on Rupa's hair. Which of the following statements best explains what occurred?

Electric Fields

An electric field is the area of electrical force around a charged particle. You can draw a model of an electric field using field lines. The direction of the arrows on the field lines depends on the type of charge.

Match

Match the charge to the image that shows the correct field lines.

• opposite charges

opposite charges

2 negative charges

2 positive charges

• opposite charges

• 2 negative charges

• 2 positive charges

Multiple Choice

Which of the following forces can electricity produce?

• gravity

• boyancy

• attraction & repulsion

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