Magnetic Moment and Torque Quiz
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Questions and Answers

In a solenoid where the magnetic moment vector is anti-parallel to the magnetic field, and the potential energy is given as $+4.8 \times 10^{-2}$ J, the system is described as:

  • Stable
  • Equilibrium
  • Unstable (correct)
  • Neutral
  • What is the torque magnitude in a solenoid where the torque tends to align the magnetic moment vector along the magnetic field, with a potential energy of 0.33 J?

  • $0.33$ Nm (correct)
  • $0.48$ Nm
  • $0.96$ Nm
  • $0.66$ Nm
  • What happens to the force in a uniform magnetic field acting on a solenoid?

  • It becomes zero (correct)
  • It remains constant
  • It decreases
  • It increases
  • In a solenoid, if the induced current direction is such that it produces an opposing flux due to a change in shape and orientation, the system will experience:

    <p>No induced current</p> Signup and view all the answers

    If a magnetic field has a strength of 0.48 G along the N-S direction, what would be its strength along the S-N direction?

    <p>-0.48 G</p> Signup and view all the answers

    What is the amplitude of the oscillating current in the given context?

    <p>9.76 mA</p> Signup and view all the answers

    What is the amplitude of the oscillating magnetic field if r = 3 cm and R = 6 cm?

    <p>1.63 × 10–11 T</p> Signup and view all the answers

    What is the wavelength band mentioned in the text for electromagnetic radiation?

    <p>25 m – 40 m</p> Signup and view all the answers

    What is the speed in vacuum according to the text?

    <p>3.00 × 10^8 m/s</p> Signup and view all the answers

    What wavelength corresponds to a photon energy of 1.24 MeV?

    <p>10–12 m</p> Signup and view all the answers

    What is the approximate wavelength of a light wave with a frequency of $6 imes 10^{14}$ Hz?

    <p>500 nm</p> Signup and view all the answers

    If the magnetic field strength is $2 imes 10^{-5}$ T, what is the force experienced by a charge moving at 3 m/s?

    <p>$8 imes 10^{-5}$ N</p> Signup and view all the answers

    If a current of 2 A flows through a wire, what is the strength of the magnetic field it generates at a distance of 4 cm from the wire?

    <p>$4.8 imes 10^{-4}$ T</p> Signup and view all the answers

    What happens to the photon energy when the wavelength of light is halved?

    <p>Photon energy is doubled</p> Signup and view all the answers

    For light traveling in vacuum, what is the approximate speed in m/s?

    <p>$3 imes 10^8$ m/s</p> Signup and view all the answers

    If a current-carrying wire generates a magnetic field of $1 imes 10^{-4}$ T at a distance of 2 cm, what would be the strength of the field at a distance of 8 cm from the wire?

    <p>$2.5 imes 10^{-5}$ T</p> Signup and view all the answers

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