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Can you explain how the polystyrene chips stick to this cat without adhesive?

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DEFINITION:
Static electricity is stationary (still-standing) charge that builds up on a material’s surface by friction (due to rubbing).

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DEFINITION:  Electrostatics is the study of electrically charged objects.

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DEFINITION:  Electrostatics is the study of electrically charged objects.

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Why do these twins' hair stand on end like this?

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Why do these twins' hair stand on end like this?

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Via a force called electrostatic force acting between static charges.

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JOHN TRAVOLTAGE

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HOW IS CHARGE POLARISED IN NEUTRAL OBJECTS?

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HOW IS CHARGE POLARISED IN NEUTRAL OBJECTS?

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Static Electricity Demonstrations Part one Induction // Homemade Science with Bruce Yeany

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TRIBOELECTRIC SERIES - When rubbed together, higher-ranked materials lose electrons, becoming positively charged, while lower-ranked materials gain electrons, becoming negatively charged.

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TRIBOELECTRIC SERIES - When rubbed together, higher-ranked materials lose electrons, becoming positively charged, while lower-ranked materials gain electrons, becoming negatively charged.

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Static electricity results when charge is isolated on an object by an insulating material.

Excess electrons – object will be charged negatively.

Deficit of electrons – object will be positively charged.

When one object is rubbed by another, electrons are transferred.

If one or both objects are insulators or insulated, then static electricity results.

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ELECTROSTATICS - The study of stationary electric charge:

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ELECTROSTATICS - The study of stationary electric charge:

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Static electricity results when this charge is isolated on an object by insulating material.

Excess electrons – object will be charged negatively.

Deficit of electrons – objects will be positively charged.

When one object is rubbed by another electrons are often transferred.   If a one or both objects are insulators or insulated then static electricity results.

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Filled out answers to questions:

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DEVICES USED TO STUDY CHARGE: ELECTROSCOPE 

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DEVICES USED TO STUDY CHARGE: ELECTROSCOPE 

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He was a Dutch-American physicist, noted for his design and construction of high-voltage Van de Graaff generators.

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DEFINITION: PRINCIPLE OF CONSERVATION OF CHARGE

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DEFINITION: PRINCIPLE OF CONSERVATION OF CHARGE

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The principle of conservation of charge states:
The net charge of an isolated system remains constant during any physical process (e.g. two charged objects making contact and separating).

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Metals are good conductors, so charge is free to move around in and on it.

Insulators (e.g. plastic and rubber) don't allow electric charges to move through them.

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EVEN VS UNEVEN SPREAD OF CHARGE:

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The elementary charge, usually denoted by e or sometimes q e, is the electric charge carried by a single electron.

Elementary charge = charge on a single electron = -1,6 x 10-19 C.

Robert A. Millikan's oil drop experiment first measured the size of the elementary charge in 1909.

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What is quantization?

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Electrons - Quantization of Electric Charge - Physics Video by Brightstorm

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Time-saving video on electrons and the quantization of electric charge. Electron charge is the transfer of electrons from one material to another. Quantization of charge means that when we say something has a given charge, we mean that that is how many times the charge of a single electron it has.

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PROBLEM: CHARGE ON CONDUCTING SPHERES AFTER TOUCHING AND SEPARATION

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PROBLEM: CHARGE ON CONDUCTING SPHERES AFTER TOUCHING AND SEPARATION

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The grounding process involves:

A transfer of electrons between the charged electroscope and the conducting object to which it is touched.

When a negatively charged electroscope is touched, electrons exit the electroscope to the ground.

When a positively charged electroscope is touched, electrons enter the electroscope from the ground.

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Phenomenon based on polar properties of water, interacting through electrostatics

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POLARISATION OF WATER IN A STREAM BY CHARGED ROD

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POLARISATION OF WATER IN A STREAM BY CHARGED ROD

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Induction occurs in conductors,

where electrons move freely and redistribute along the surface due to an external electric field.

Polarisation happens in insulators,

where electrons shift slightly within their molecules, creating a dipole effect.

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Static Electricity Demonstrations Part one Induction // Homemade Science with Bruce Yeany

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IN A VAN DE GRAAFF GENERATOR

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This is:

a non-contact (distance) force

the force between CHARGES.

an attractive or repulsive.

following the principle: "Unlike charges attract, like charges repel".

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An electrically charged object always generates an electric field around it.

Definition:   An electric field is a region of space in which an electric charge experiences a force.

The electric field is continuous around an object but we use electric field lines to represent the field.

An electric field line is a line drawn in such a way that a small positively charged object placed on the line will experience a resultant force at a tangent to the line at that point.

Properties of electric field lines:

1.          They start on positive charges and end on negative
charges.

2.         They never cross.

3.         They are 3-dimensional.

4.         The denser the field lines the stronger the field.

5.         They enter and leave charged object at right angles.

6.         They are continuous (although drawn as separate
lines).

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VAN DER GRAAFF GENERATOR – HOW DOES IT WORK?

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VAN DER GRAAFF GENERATOR – HOW DOES IT WORK?

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VAN DER GRAAFF GENERATOR – HOW DOES IT WORK?

·      consists of a large hollow metallic dome supported by an insulating column
·      A rubber belt runs on pulleys
·      At the top and bottom of the column are two electrodes E ₁ and E ₂ which end in sharply pointed combs.  They allow electrons to transfer.
·      Electrons transfer onto the belt at the bottom electrode, and transfer off the belt at the top electrode.
·      The electrons collect on the dome, and given an opportunity, will move off and discharge by sparking across a gap.
·      The belt rotates, allowing a continuous buildup of charge.

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How Does a Van de Graaff Generator Work?

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How does a Van de Graaff Generator work?

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SCIENCE OF LIGHTNING https://youtu.be/fzNk4w2k2h0          

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SCIENCE OF LIGHTNING https://youtu.be/fzNk4w2k2h0          

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Sprites, Jets, and Glowing Balls: The Science of Lightning

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Copiers: A Playful Look at How They Work

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Charge the Drum: A high voltage applies a negative charge to the drum's surface.

Exposure to Light: Light photons hit the drum, removing charge where light strikes, creating a charged image of the document.

Toner Application: Charcoal graphite and plastic toner particles are applied and stick to the charged areas of the drum.

Transfer to Paper: The toner image is transferred from the drum to the positively charged paper.

Fusing: Heat and pressure fuse the toner onto the paper, making the image permanent.

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Photoreceptor drum, Corona wires, Lamp, lenses, Toner, Fuser

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ANSWER:

Stage 2

Light falls onto the plate, reflected off the scanned image.

Charge leaks away where the photons of light fall.

Stage 3

– Negatively charged toner particles (carbon and plastic mix)

- are attracted to the positively charged areas on the plate.

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CLEANING UP INDUSTRIAL SMOKE USING ELECTROSTATICS

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CLEANING UP INDUSTRIAL SMOKE USING ELECTROSTATICS

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Smoke is produced when fossil fuels burn.

Smoke is made of tiny solid particles, such as carbon.

To remove these particles from the waste gases an electrostatic precipitator is used.

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Static Electricity Demonstrations Part one Induction // Homemade Science with Bruce Yeany