Electric Charges and Fields: Introduction
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Questions and Answers

What is the study of forces, fields, and potentials arising from static charges called?

Electrostatics

Who is credited with the discovery that amber rubbed with wool or silk cloth attracts light objects?

Thales of Miletus

What is the phenomenon of seeing a spark or hearing a crackle when taking off synthetic clothes or sweater attributed to?

Discharge of electric charges through the body

What does the term 'static' mean in the context of electrostatics?

<p>Anything that does not move or change with time</p> Signup and view all the answers

What is the name given to electricity, coined from the Greek word 'elektron' meaning amber?

<p>Electricity</p> Signup and view all the answers

What is another common example of electric discharge mentioned in the text?

<p>Lightning during thunderstorms</p> Signup and view all the answers

What happens when two glass rods rubbed with wool or silk cloth are brought close to each other?

<p>They repel each other.</p> Signup and view all the answers

What is the property that differentiates the two kinds of charges?

<p>Polarity of charge.</p> Signup and view all the answers

What is the name of the American scientist who named the charges as positive and negative?

<p>Benjamin Franklin.</p> Signup and view all the answers

What is the name of the entry that is called the electric charge?

<p>Electric charge.</p> Signup and view all the answers

What kind of charges repel each other?

<p>Like charges.</p> Signup and view all the answers

What happens to the charges acquired after rubbing when the charged bodies are brought in contact?

<p>They are lost.</p> Signup and view all the answers

What is the name of the simple apparatus to detect charge on a body?

<p>Gold-leaf electroscope.</p> Signup and view all the answers

What is the name given to an object possessing an electric charge?

<p>Electrified or charged.</p> Signup and view all the answers

What is the name given to an object with no charge?

<p>Electrically neutral.</p> Signup and view all the answers

What is the name given to the charges on glass rod or cat’s fur?

<p>Positive.</p> Signup and view all the answers

Study Notes

Electrostatics

  • Electrostatics is the study of forces, fields, and potentials arising from static charges.

Discovery of Electrostatics

  • Thales of Miletus is credited with the discovery that amber rubbed with wool or silk cloth attracts light objects.

Static Electricity

  • The phenomenon of seeing a spark or hearing a crackle when taking off synthetic clothes or sweater is attributed to static electricity.
  • In the context of electrostatics, the term 'static' refers to electricity at rest.

Electricity

  • Electricity is named after the Greek word 'elektron', meaning amber.

Electric Discharge

  • Lightning is another common example of electric discharge.

Like and Unlike Charges

  • When two glass rods rubbed with wool or silk cloth are brought close to each other, they repel each other.
  • The property that differentiates the two kinds of charges is that like charges repel each other, while unlike charges attract each other.

Benjamin Franklin

  • American scientist Benjamin Franklin named the charges as positive and negative.

Electric Charge

  • Electric charge is an entry that is a fundamental property of matter.

Charge Interaction

  • Like charges repel each other, while unlike charges attract each other.
  • When two charged bodies are brought in contact, the charges acquired after rubbing neutralize each other.

Detecting Charge

  • An electroscope is a simple apparatus to detect charge on a body.

Charged Objects

  • An object possessing an electric charge is called a charged object.
  • An object with no charge is called a neutral object.
  • The charges on a glass rod or cat's fur are called static charges.

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Description

Test your knowledge on the introduction to electric charges and fields. This quiz covers the basic concepts of electric discharge, lightning, and electric shock.

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