General Physics 2: Electricity Quiz
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Questions and Answers

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?

  • 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?

  • 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?

    <p>Protons and electrons</p> Signup and view all the answers

    What is characterized by the flow of electrons through conductors?

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

    What does electric charge, like mass, represent?

    <p>One of the basic properties of certain elementary particles</p> Signup and view all the answers

    What is the S.I. unit of electric charge?

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

    What happens when an atom loses one or more electrons?

    <p>It becomes a positive ion</p> Signup and view all the answers

    What is always conserved with respect to electric charge?

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

    How can substances be classified in terms of their ability to conduct electric charge?

    <p>By their ability to conduct electricity</p> Signup and view all the answers

    What did Charles Coulomb experimentally establish in 1785?

    <p>The fundamental law of electric force between two stationary charged particles</p> Signup and view all the answers

    What is the magnitude of electric force between charges 𝑞1 and 𝑞2 separated by a distance r?

    <p>$𝑭=𝒌 \frac{𝒒𝟏 𝒒𝟐}{𝒓𝟐}$</p> Signup and view all the answers

    When an atom gains one or more electrons, what does it become?

    <p>A negative ion</p> Signup and view all the answers

    What is the charge of a plastic ball with a value of −10−12 𝐶?

    <p>-10 C</p> Signup and view all the answers

    What happens to a sphere when it is grounded?

    <p>It loses its excess positive charge</p> Signup and view all the answers

    What does a neutral metallic sphere consist of?

    <p>Equal numbers of positive and negative charges</p> Signup and view all the answers

    What phenomenon causes the high concentration of electrical charge in a thundercloud during a thunderstorm?

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

    Which particles carry positive charge and negative charge respectively in ordinary matter?

    <p>Protons and electrons</p> Signup and view all the answers

    What is the origin of the word 'electricity'?

    <p>Greek word for electron</p> Signup and view all the answers

    What creates an enormous spark between the charged cloud and the ground during a thunderstorm?

    <p>High concentration of electric field</p> Signup and view all the answers

    What is characterized by the accumulation of charged electricity on the surface of a substance?

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

    What fundamental law of electric force did Charles Coulomb experimentally establish in 1785?

    <p>Attraction or repulsion of charges</p> Signup and view all the answers

    What is the magnitude of electric force F between charges 𝑞1 and 𝑞2 separated by a distance r as per Coulomb's law?

    <p>$F=\frac{kq_1q_2}{r^2}$</p> Signup and view all the answers

    What does a neutral metallic sphere consist of?

    <p>Equal numbers of positive and negative charges</p> Signup and view all the answers

    What is the S.I. unit of electric charge?

    <p>Coulomb (C)</p> Signup and view all the answers

    What happens when an atom loses one or more electrons?

    <p>It becomes a positive ion</p> Signup and view all the answers

    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.

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