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Questions and Answers
What is the phenomenon caused by the presence or movement of electrically charged particles?
What is the phenomenon caused by the presence or movement of electrically charged particles?
- Electrostatics
- Mass
- Electricity (correct)
- Electrodynamics
What creates an electric discharge between the charged cloud and the ground during a thunderstorm?
What creates an electric discharge between the charged cloud and the ground during a thunderstorm?
- Presence of rain in the clouds
- Low concentration of electrical charge in a thundercloud
- High concentration of electrical charge in a thundercloud (correct)
- Strong magnetic field between the cloud and the ground
What are the two forms of electricity mentioned in the text?
What are the two forms of electricity mentioned in the text?
- Lightning and thunder
- Positive charge and negative charge
- Protons and electrons
- Electrostatics and electrodynamics (correct)
Which elementary particles carry positive charge and negative charge respectively?
Which elementary particles carry positive charge and negative charge respectively?
What is characterized by the flow of electrons through conductors?
What is characterized by the flow of electrons through conductors?
What does electric charge, like mass, represent?
What does electric charge, like mass, represent?
What is the S.I. unit of electric charge?
What is the S.I. unit of electric charge?
What happens when an atom loses one or more electrons?
What happens when an atom loses one or more electrons?
What is always conserved with respect to electric charge?
What is always conserved with respect to electric charge?
How can substances be classified in terms of their ability to conduct electric charge?
How can substances be classified in terms of their ability to conduct electric charge?
What did Charles Coulomb experimentally establish in 1785?
What did Charles Coulomb experimentally establish in 1785?
What is the magnitude of electric force between charges 𝑞1 and 𝑞2 separated by a distance r?
What is the magnitude of electric force between charges 𝑞1 and 𝑞2 separated by a distance r?
When an atom gains one or more electrons, what does it become?
When an atom gains one or more electrons, what does it become?
What is the charge of a plastic ball with a value of −10−12 𝐶?
What is the charge of a plastic ball with a value of −10−12 𝐶?
What happens to a sphere when it is grounded?
What happens to a sphere when it is grounded?
What does a neutral metallic sphere consist of?
What does a neutral metallic sphere consist of?
What phenomenon causes the high concentration of electrical charge in a thundercloud during a thunderstorm?
What phenomenon causes the high concentration of electrical charge in a thundercloud during a thunderstorm?
Which particles carry positive charge and negative charge respectively in ordinary matter?
Which particles carry positive charge and negative charge respectively in ordinary matter?
What is the origin of the word 'electricity'?
What is the origin of the word 'electricity'?
What creates an enormous spark between the charged cloud and the ground during a thunderstorm?
What creates an enormous spark between the charged cloud and the ground during a thunderstorm?
What is characterized by the accumulation of charged electricity on the surface of a substance?
What is characterized by the accumulation of charged electricity on the surface of a substance?
What fundamental law of electric force did Charles Coulomb experimentally establish in 1785?
What fundamental law of electric force did Charles Coulomb experimentally establish in 1785?
What is the magnitude of electric force F between charges 𝑞1 and 𝑞2 separated by a distance r as per Coulomb's law?
What is the magnitude of electric force F between charges 𝑞1 and 𝑞2 separated by a distance r as per Coulomb's law?
What does a neutral metallic sphere consist of?
What does a neutral metallic sphere consist of?
What is the S.I. unit of electric charge?
What is the S.I. unit of electric charge?
What happens when an atom loses one or more electrons?
What happens when an atom loses one or more electrons?
Study Notes
Electric Charge and Electricity
- Electric charge is the phenomenon caused by the presence or movement of electrically charged particles.
- Electric discharge between the charged cloud and the ground during a thunderstorm is created by the buildup of electrical charge in the cloud.
Types of Electricity
- There are two forms of electricity: positive and negative.
Elementary Particles
- Protons carry positive charge.
- Electrons carry negative charge.
Electric Current
- Electric current is characterized by the flow of electrons through conductors.
Electric Charge Properties
- Electric charge, like mass, represents a fundamental property.
- The S.I. unit of electric charge is Coulomb (C).
- Electric charge is always conserved.
Atom Charging
- When an atom loses one or more electrons, it becomes positively charged (ion).
- When an atom gains one or more electrons, it becomes negatively charged (ion).
Conductors and Insulators
- Substances can be classified as conductors or insulators based on their ability to conduct electric charge.
Coulomb's Law
- Charles Coulomb experimentally established in 1785 that the magnitude of electric force between charges 𝑞1 and 𝑞2 separated by a distance r is F = 𝑘 * 𝑞1 * 𝑞2 / 𝑟^2.
- A plastic ball with a value of −10^−12 C has a negative charge.
Grounding
- When a sphere is grounded, the electrons flow away from it, leaving it neutral.
- A neutral metallic sphere consists of an equal number of protons and electrons.
Thunderstorms
- The high concentration of electrical charge in a thundercloud during a thunderstorm is caused by the separation of electrical charges.
- The enormous spark between the charged cloud and the ground during a thunderstorm is created by the buildup of electrical charge in the cloud.
Origin of Electricity
- The origin of the word 'electricity' comes from the Greek word 'elektron', meaning amber.
Electrostatics
- Electrostatics is characterized by the accumulation of charged electricity on the surface of a substance.
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Description
Test your knowledge of electricity in physics with this quiz. Explore concepts such as electric fields, lightning, and electrical discharges observed in the sky.
