Magnetic Field and Magnetic Flux Quiz
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Questions and Answers

What is the name of the rule that describes the direction of the magnetic field around a current-carrying wire?

  • Ampere's law
  • Lenz's law
  • Maxwell's right-hand rule (correct)
  • Faraday's law

    • What happens when electric current is passed through a circular wire with iron filings scattered around it?

  • The iron filings are repelled from the wire, creating a visible magnetic field.
  • The iron filings form rings around the wire, showing the direction of the magnetic field. (correct)
  • The iron filings are attracted to the wire, creating a visible magnetic field.
  • The iron filings have no visible effect on the magnetic field around the wire.

    • What is the relationship between the strength of the magnetic field around a solenoid and the number of turns in the coil of the solenoid?

  • The strength of the magnetic field is exponentially related to the number of turns in the coil.
  • The strength of the magnetic field is directly proportional to the number of turns in the coil. (correct)
  • The strength of the magnetic field is independent of the number of turns in the coil.
  • The strength of the magnetic field is inversely proportional to the number of turns in the coil.

    • Which of the following factors does NOT affect the strength of the magnetic field around a solenoid?

    <p>Length of the solenoid</p> Signup and view all the answers

    What rule can be used to determine the direction of the magnetic field developed around a current-flowing solenoid?

    <p>Maxwell's right-hand grip rule</p> Signup and view all the answers

    What type of material increases the strength of a magnetic field?

    <p>Hard iron</p> Signup and view all the answers

    Which of the following is NOT a factor that affects the strength of the magnetic field around a solenoid?

    <p>Voltage applied to the solenoid</p> Signup and view all the answers

    What is the unit of magnetic flux?

    <p>Weber (Wb)</p> Signup and view all the answers

    Which physicist is associated with Faraday's Law of Electromagnetic Induction?

    <p>Michael Faraday</p> Signup and view all the answers

    What is induced when there is a change in magnetic flux linked to a closed circuit?

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

    What is the principle behind electromagnetic induction?

    <p>Faraday's Law</p> Signup and view all the answers

    What term is used to describe the total number of magnetic lines of force passing through a surface in a magnetic field?

    <p>Magnetic flux</p> Signup and view all the answers

    What is the primary reason for using a soft iron core in a transformer?

    <p>To facilitate the conversion of magnetic energy into electrical energy</p> Signup and view all the answers

    Why is direct current (DC) not suitable for use in a transformer?

    <p>It generates a constant magnetic field, preventing induction</p> Signup and view all the answers

    Why does a ceiling fan not rotate when connected to a solar panel?

    <p>Solar panels generate direct current (DC), which ceiling fan motors cannot operate on</p> Signup and view all the answers

    What is the reason for a magnetic compass needle deflecting when placed near a circuit with an electric current?

    <p>The electric current creates a magnetic field that interacts with the compass needle</p> Signup and view all the answers

    Why is an electromagnet used in an electric bell?

    <p>To create a magnetic field that attracts the armature and strikes the bell</p> Signup and view all the answers

    What is the principle behind electromagnetic induction in a transformer?

    <p>Faraday's Law of Electromagnetic Induction</p> Signup and view all the answers

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