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Questions and Answers
What is the term used to describe interactions of charges when they are stationary?
What is the term used to describe interactions of charges when they are stationary?
- Electrostatics (correct)
- Magnetostatics
- Electrokinetics
- Electrodynamics
Who discovered the presence of electrons in 1897?
Who discovered the presence of electrons in 1897?
- Benjamin Franklin
- Newton
- JJ Thomson (correct)
- Rutherford
What did Benjamin Franklin name the charge on a glass rod rubbed with silk?
What did Benjamin Franklin name the charge on a glass rod rubbed with silk?
- Neutral charge
- Positive electricity (correct)
- Negative electricity
- Ambient electricity
What property of matter is carried by elementary particles?
What property of matter is carried by elementary particles?
What did JJ Thomson discover about all electrons present in every atom?
What did JJ Thomson discover about all electrons present in every atom?
What charge is assigned to the proton according to the text?
What charge is assigned to the proton according to the text?
What is the fundamental property of matter that is carried by elementary particles?
What is the fundamental property of matter that is carried by elementary particles?
Who discovered the presence of electrons in 1897?
Who discovered the presence of electrons in 1897?
What did Benjamin Franklin name the charge on materials rubbed with an animal fur?
What did Benjamin Franklin name the charge on materials rubbed with an animal fur?
What term is used to describe the interactions of charges when they are stationary?
What term is used to describe the interactions of charges when they are stationary?
Which scientist discovered the presence of protons in atoms?
Which scientist discovered the presence of protons in atoms?
What did JJ Thomson discover about all electrons present in every atom?
What did JJ Thomson discover about all electrons present in every atom?
What did Benjamin Franklin name the charge on a glass rod rubbed with silk?
What did Benjamin Franklin name the charge on a glass rod rubbed with silk?
Why does a charged conducting sphere have no electric field inside it according to the text?
Why does a charged conducting sphere have no electric field inside it according to the text?
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Study Notes
Electrostatics
- Static electricity is produced when there is an imbalance of electrical charges.
- The word "electricity" comes from the Greek word "elektron", meaning amber.
Electric Charges
- Electric charges are a fundamental property of matter carried by elementary particles.
- Charges can be either positive or negative.
Benjamin Franklin
- Conducted experiments involving flying kites during thunderstorms, leading to the discovery of electric charge.
- Named the charge on a glass rod rubbed with silk as Positive electricity.
- Named the charge on materials (similar to ebonite) rubbed with an animal fur as Negative.
JJ Thompson
- Discovered the presence of electrons in 1897.
- Found that all electrons present in every atom have the same charge.
- Rutherford's experiment showed that atoms also contain protons with an opposite charge to electrons.
- Negative charge is assigned to electrons, while Positive charge is assigned to protons.
Methods of Electrostatic Charging
- Static electricity is produced when there is an imbalance of electrical charges.
- The study of stationary charges is crucial to understand electricity and magnetism.
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