Electrostatics

Question 1

The law of conservation

Answer 1

Here’s the revised sentence:

The Law of Conservation of Energy states: “Energy cannot be created or destroyed, only converted from one form to another, within an isolated system or between a system and its surroundings.”

Question 2

Charging by friction

Answer 2

Here’s a concise summary in paragraph form:

Charging by friction, or triboelectrification, occurs when two materials come into contact and rub against each other, transferring electrons and creating an imbalance of electric charge. This process results in one material becoming positively charged (losing electrons) and the other negatively charged (gaining electrons). Everyday examples include rubbing a balloon against hair, walking on carpet, or removing plastic wrap. The transferred electrons create static electricity, potentially attracting light objects or causing sparks, and can even damage electronics or lead to explosions in extreme cases.

Question 3

Charging by polarization

Answer 3

Here’s a simplified summary:

Charging by polarization happens when an electric field aligns tiny charges within a material, creating a temporary or permanent electric charge without transferring electrons. Think of it like lining up tiny magnets to create a bigger magnetic field.

Examples:

• Electric fields affecting certain materials
• Heating/cooking materials
• Applying pressure

Result:

• Temporary or permanent electric charge

Used in:

• Sensors
• Capacitors
• Optical devices

Question 4

Effects of distance and charge magnitude on electrostatic forces

Answer 4

Here’s a simplified explanation:

The force between two charged objects depends on two things: how far apart they are and how strong their charges are.

1. Distance: As objects move farther apart, the force between them weakens. Get twice as far away, and the force becomes 1/4 as strong.
2. Charge: The stronger the charge, the stronger the force. Double the charge, and the force doubles.

Also, remember:

• Opposite charges (positive and negative) attract each other.
• Same charges (both positive or both negative) repel each other.

That’s the basics of electrostatic forces!

Question 5

Formula to calculate charge of an electron

Answer 5

N=Q(final charge minus initial charge) /-1,6×10 to the power of negative 19

Question 6

Formula to calculate charge after objects interact

Answer 6

Q=(Q1+Q2) /2

Question 7

For a neutral atom, the number of protons equal

Answer 7

The number of electrons so your charge (Q) will equal 0

Question 8

Qe

Answer 8

-1,6×10 to the power of negative 19