Electric Current Overview
16 Questions
3 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

In electric circuits, what are the charge carriers often?

  • Protons
  • Neutrons
  • Positrons
  • Electrons (correct)
  • What do electric currents create in ordinary conductors?

  • Sound waves
  • Radiation
  • Magnetic fields (correct)
  • Electric fields
  • What is the SI unit for electric current?

  • Watt
  • Ohm
  • Volt
  • Ampere (correct)
  • What device is used to measure electric current?

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

    In which type of conductor can charge carriers be electrons or holes?

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

    What are the moving particles called in an electric current?

    <p>Charge carriers</p> Signup and view all the answers

    In a conductive material, what are the moving charged particles that constitute the electric current called?

    <p>Charge carriers</p> Signup and view all the answers

    In metals, which type of particles are the charge carriers responsible for electric current?

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

    Who used the symbol I to represent current in formulating Ampère's force law?

    <p>André-Marie Ampère</p> Signup and view all the answers

    What are the charge carriers in semiconductors?

    <p>Positive or negative</p> Signup and view all the answers

    Why is a convention needed for the direction of current that is independent of the type of charge carriers?

    <p>Because current can be the flow of either positive or negative charges, or both</p> Signup and view all the answers

    What does a flow of positive charges give in an electrical circuit?

    <p>The same electric current as an equal flow of negative charges in the opposite direction</p> Signup and view all the answers

    What is meant by the reference direction of the current I?

    <p>The direction representing positive current specified by an arrow on the circuit schematic diagram</p> Signup and view all the answers

    When analyzing electrical circuits, why are the reference directions of currents often assigned arbitrarily?

    <p>The actual direction of current through a specific circuit element is usually unknown until the analysis is completed</p> Signup and view all the answers

    'Ohm's law' states what relationship?

    <p>$I = V/R$</p> Signup and view all the answers

    What does Ohm's law state about the relationship between current, voltage, and resistance?

    <p>$I = V/R$</p> Signup and view all the answers

    More Like This

    Physics Fundamentals Quiz
    10 questions
    Electric Current Basics Quiz
    5 questions
    Electric Current Basics Quiz
    30 questions

    Electric Current Basics Quiz

    InstructiveLimeTree avatar
    InstructiveLimeTree
    Use Quizgecko on...
    Browser
    Browser