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JOHN TRAVOLTAGE - HOW IS STATIC CHARGE GENERATED?

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JOHN TRAVOLTAGE - HOW IS STATIC CHARGE GENERATED?

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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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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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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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Discharging an electroscope

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POLARISATION = It is the process of a charged object to induce electron movement or electron rearrangement.

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POLARIZED WATER STREAM INTERACTS WITH CHARGED OBJECTS 

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POLARIZED WATER STREAM INTERACTS WITH CHARGED OBJECTS 

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ELECTROSTATIC FORCE FALLS OFF WITH DISTANCE 

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ELECTROSTATIC FORCE FALLS OFF WITH DISTANCE 

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Dependence of force on distance between charged objects

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Electric Charge: Crash Course Physics #25

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EXAMPLE 1:
The following three charges with distances apart are given:

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Solution:

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Calculate the net force on the red charge.

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ELECTROSTATICS IN ACTION - BUILD YOUR OWN PARTICLE ACCELERATOR 

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ELECTROSTATICS IN ACTION - BUILD YOUR OWN PARTICLE ACCELERATOR 

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Build your own particle accelerator! #CERN #LearnOnTikTok #STEM #LHC #particleaccelerator #particlephysics

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ELECTRIC FIELD LINES AROUND EQUIVALENT CHARGES ARE ALWAYS SYMMETRICAL

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ELECTRIC FIELD LINES AROUND EQUIVALENT CHARGES ARE ALWAYS SYMMETRICAL

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UNSYMMETRICAL ELECTRIC FIELD BETWEEN NON-EQUIVALENT CHARGES

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UNSYMMETRICAL ELECTRIC FIELD BETWEEN NON-EQUIVALENT CHARGES

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The bigger charge exerts the greater force - "pushes further"

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COMPARE THE STRENGTH OF THE BLUE AND RED CHARGES RELATIVE TO EACH OTHER:

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COMPARE THE STRENGTH OF THE BLUE AND RED CHARGES RELATIVE TO EACH OTHER: