What is static electricity?

When a material gains or loses electrons and builds up a + or - charge.

Name a few ways that static electricity affects our lives.

Lightning. Static charge from flowing gas can cause sparks that ignite at a gas station. Capacitors in electronic devices build up electric charge and then release it.

What is the triboelectric effect?

The tendency of some materials to easily lose electrons while others attract them when rubbed together.

List a few materials that tend to lose electrons when rubbed.

Hair, fur, leather, glass, nylon, wool, silk.

List a few materials that tend to gain electrons when rubbed.

Rubber, PVC, most plastics, Saran wrap, polyester.

How does the weather affect static electricity?

On dry days, much more static can build up. (3000V before it sparks). On a humid day, charge easily is lost to water molecules in the air (1000V for a spark).

How can you prevent shocks and sparks from static electricity?

Grounding. Touching the earth directly (no rubber shoes), or touching metal that is touching earth.

How does lightning work?

As warm air rises, little water droplets rub against ice particles in clouds and steal some electrons. This leads to a huge - charge on the bottom of the cloud and + charge on top.

Name a few materials that are electrical insulators.

Rubber, air, plastic, wood, glass.

Name a few materials that are electrical conductors.

Metals like aluminum, copper, gold, nickel, and iron.

What is an electric field?

The area around a charged object. The lines show how strong the field is and which direction a + charge would move.

Draw the electric field around a - charged balloon.

Draw straight field lines around the balloon all pointing in to the middle.

Draw the electric field around a + charged object.

Draw straight field lines around the object all pointing away, like rays from the sun.

Draw the electric field between a + and - charged object.

Draw many lines between them, arching from the + towards the -.

Draw the electric field between a - and - charged object.

Draw lines between them bending away from each other, with a empty area in the middle.

What is electrostatic induction?

The attraction between a charged object and a neutral object. If the charged object is -, it will repel - charges in the neutral object, so the remaining + charges cause the 2 objects to attract.

Why does a charged balloon stick to a wall?

Because of electrostatic induction.

Why does an electric shock cause muscles to contract?

Nerve signals from the brain use electrochemical impulses. The electric shock causes the same response as a signal from the brain.

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Static Electricity

Question	Answer
What is static electricity?	When a material gains or loses electrons and builds up a + or - charge.
Name a few ways that static electricity affects our lives.	Lightning. Static charge from flowing gas can cause sparks that ignite at a gas station. Capacitors in electronic devices build up electric charge and then release it.
What is the triboelectric effect?	The tendency of some materials to easily lose electrons while others attract them when rubbed together.
List a few materials that tend to lose electrons when rubbed.	Hair, fur, leather, glass, nylon, wool, silk.
List a few materials that tend to gain electrons when rubbed.	Rubber, PVC, most plastics, Saran wrap, polyester.
How does the weather affect static electricity?	On dry days, much more static can build up. (3000V before it sparks). On a humid day, charge easily is lost to water molecules in the air (1000V for a spark).
How can you prevent shocks and sparks from static electricity?	Grounding. Touching the earth directly (no rubber shoes), or touching metal that is touching earth.
How does lightning work?	As warm air rises, little water droplets rub against ice particles in clouds and steal some electrons. This leads to a huge - charge on the bottom of the cloud and + charge on top.
Name a few materials that are electrical insulators.	Rubber, air, plastic, wood, glass.
Name a few materials that are electrical conductors.	Metals like aluminum, copper, gold, nickel, and iron.
What is an electric field?	The area around a charged object. The lines show how strong the field is and which direction a + charge would move.
Draw the electric field around a - charged balloon.	Draw straight field lines around the balloon all pointing in to the middle.
Draw the electric field around a + charged object.	Draw straight field lines around the object all pointing away, like rays from the sun.
Draw the electric field between a + and - charged object.	Draw many lines between them, arching from the + towards the -.
Draw the electric field between a - and - charged object.	Draw lines between them bending away from each other, with a empty area in the middle.
What is electrostatic induction?	The attraction between a charged object and a neutral object. If the charged object is -, it will repel - charges in the neutral object, so the remaining + charges cause the 2 objects to attract.
Why does a charged balloon stick to a wall?	Because of electrostatic induction.
Why does an electric shock cause muscles to contract?	Nerve signals from the brain use electrochemical impulses. The electric shock causes the same response as a signal from the brain.

Created by: buchwalder

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