Charging Methods in IB Physics

The video tutorial covers the transfer of charge between objects through different mechanisms: friction, contact, and induction. It emphasizes the conservation of charge and explains how friction results in opposite charges, contact results in the same charge, and induction also leads to opposite charges. Grounding or earthing is discussed as a method to neutralize charge by connecting to the ground. The tutorial uses animations and examples to illustrate these concepts, making it easier to understand the behavior of electrons and charge distribution.

What is the key principle that must be conserved during charge transfer?

• Momentum

• Charge

• Energy

• Mass

What happens to a balloon when it is rubbed against a shirt?

• It becomes negatively charged and attracts the shirt.

• It becomes positively charged and repels the shirt.

• It becomes neutral and has no effect on the shirt.

• It becomes positively charged and attracts the shirt.

Tags

NGSS.HS-PS3-5

Why does a balloon stick to a wall after being rubbed against a shirt?

• The balloon becomes positively charged.

• The wall becomes slightly positively charged.

• The balloon becomes neutral.

• The wall becomes negatively charged.

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NGSS.HS-PS2-4

What is the result of charging by friction?

• The materials end up with neutral charges.

• The materials end up with opposite charges.

• Both materials end up with no charge.

• Both materials end up with the same charge.

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NGSS.HS-PS1-2

In charging by contact, what happens to the charges of the materials involved?

• They end up with opposite charges.

• They end up with the same charge.

• One becomes neutral and the other charged.

• Both become neutral.

What is the purpose of grounding (earthing) an object?

• To make it negatively charged.

• To make it positively charged.

• To neutralize its charge.

• To increase its charge.

Why did the narrator wear an electrostatic discharge bracelet in the lab?

• To prevent static charge buildup.

• To create static charge.

• To increase static charge.

• To measure static charge.

What happens to electrons during grounding?

• They move into the object.

• They move into the ground.

• They stay in the object.

• They disappear.

In charging by induction, what is the result of the process?

• Both objects end up with the same charge.

• Both objects end up neutral.

• The objects end up with opposite charges.

• One object becomes neutral.

Which of the following is NOT a method of charging discussed in the video?

• Radiation

• Induction

• Contact

• Friction