JEE Advanced 2021 Pattern Quiz
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Questions and Answers

What is the characteristic of the special metal S?

  • It does not conduct electricity at all
  • It conducts electricity with some resistance
  • It only conducts electricity under certain conditions
  • It conducts electricity without any resistance (correct)

    • What is the purpose of the induced current in the loop?

  • To generate heat in the loop
  • To repel the magnetic dipole (correct)
  • To attract the magnetic dipole
  • To change the flux through the loop

    • What is the direction of the magnetic dipole's north pole with respect to the loop?

  • Always facing the loop (correct)
  • Alternating between facing and away from the loop
  • Perpendicular to the loop
  • Always facing away from the loop

    • What is the formula for the magnitude of the magnetic field of a dipole m, at a point on its axis at distance r?

    <p>$\frac{μ_0 m}{2π r^2}$</p> Signup and view all the answers

    Why does the induced current in the loop not decay?

    <p>Due to the metal's zero resistance</p> Signup and view all the answers

    What is the condition for the distance r of the magnetic dipole from the loop's centre?

    <p>r &gt;&gt; a</p> Signup and view all the answers

    What is the direction of the force between two magnetic dipoles with moments m1 and m2, separated by a distance r on the common axis?

    <p>Along the line joining the two dipoles</p> Signup and view all the answers

    What is the current induced in the loop when a magnetic dipole is placed at a distance r from the center of the loop?

    <p>Proportional to m/r2</p> Signup and view all the answers

    What is the work done in bringing a magnetic dipole from infinity to a distance r from the center of the loop?

    <p>Proportional to m2/r6</p> Signup and view all the answers

    What is the magnitude of the force between two magnetic dipoles with moments m1 and m2, separated by a distance r on the common axis?

    <p>km1m2/r4</p> Signup and view all the answers

    What is the direction of the magnetic field lines of a magnetic dipole?

    <p>From south pole to north pole</p> Signup and view all the answers

    What is the physical significance of the magnetic moment of a magnetic dipole?

    <p>It measures the torque experienced by a dipole in a magnetic field</p> Signup and view all the answers

    What is the direction of the magnetic field B?

    <p>normal to the xy plane</p> Signup and view all the answers

    What is the condition for BP = 0?

    <p>i2 = 2i1</p> Signup and view all the answers

    What is the nature of the magnetic field at the centre?

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

    What is the reason for the magnetic field changing rapidly as point P approaches the circumference?

    <p>the proximity to the circumference</p> Signup and view all the answers

    What can be said about the magnetic field inside the inner loop?

    <p>it is zero at some points</p> Signup and view all the answers

    What is the relationship between x1 and x2?

    <p>x1 &gt; x2</p> Signup and view all the answers

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