Exploring the Connection

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Questions and Answers

What is the orientation of the needle in relation to the straight wire in Oersted's experiment?

  • Tangential to an imaginary circle with the wire as its center (correct)
  • Perpendicular to the wire
  • Parallel to the wire
  • Aligned with the earth's magnetic field

Which phenomenon did Danish physicist Hans Christian Oersted notice during a lecture demonstration in 1820?

  • The deflection of a magnetic compass needle caused by a current in a straight wire (correct)
  • The tangential alignment of a magnetic compass needle with an imaginary circle
  • The reversal of the orientation of a magnetic compass needle
  • The alignment of a magnetic compass needle with the earth's magnetic field

What happens to the orientation of the needle when the direction of the current is reversed?

  • The orientation of the needle remains the same
  • The needle becomes aligned with the earth's magnetic field
  • The needle becomes parallel to the wire
  • The orientation of the needle also reverses (correct)

When does the deflection of the needle become noticeable?

<p>When the current is large and the needle is close to the wire (C)</p> Signup and view all the answers

What happens to the deflection of the needle when the current is increased or the needle is brought closer to the wire?

<p>The deflection increases (C)</p> Signup and view all the answers

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