Magnetic Dipole Moment, Torque and Equilibrium of Current-Carrying Loops questions with solutions

Showing 1–10 of 58 questions

• MCQmediumMagnetic effect of currentMagnetic Dipole Moment, Torque and Equilibrium of Current-Carrying Loops

  A uniformly wound semicircular half-toroid contains N identical small turns, each of area A and current I. The magnetic-moment vectors of the turns are uniformly distributed in direction over an angular span π. What is the magnitude of their resultant magnetic moment?

  Options

  • Option A

    2NIA/π

  • Option B

    NIA

  • Option C

    NIA/π

  • Option D

    Zero

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• Multi-correctmediumMagnetic effect of currentMagnetic Dipole Moment, Torque and Equilibrium of Current-Carrying Loops

  A uniformly charged ring of total charge Q and mass M rotates about its symmetry axis. Which statements are correct?

  Select all that apply

  • Option A

    It behaves as a current loop.

  • Option B

    Its magnetic moment is proportional to angular speed.

  • Option C

    Its angular momentum is proportional to angular speed.

  • Option D

    For uniform charge and mass distributions on the same ring, μ/L=Q/(2M).

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• MCQmediumMagnetic effect of currentMagnetic Dipole Moment, Torque and Equilibrium of Current-Carrying Loops

  A plane current spiral is described by r=aθ for θ₀≤θ≤2π, where θ₀>0, and carries current I. What is the magnetic field at the pole due only to the spiral portion?

  Options

  • Option A

    (μ₀I/4πa) ln(2π/θ₀)

  • Option B

    μ₀I(2π-θ₀)/(4πa)

  • Option C

    μ₀I/(2aθ₀)

  • Option D

    Zero

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• MCQeasyMagnetic effect of currentMagnetic Dipole Moment, Torque and Equilibrium of Current-Carrying Loops

  The circuit shown has a 10 V cell, 400 Ω series resistor, a resistor R and a 2 V cell connected through an ideal galvanometer G. G shows zero deflection. Determine R. [Image]

  Options

  • Option A

    100 Ω

  • Option B

    400 Ω

  • Option C

    200 Ω

  • Option D

    50 Ω

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  NEET 2023NEET Previous Year

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• MCQeasyMagnetic effect of currentMagnetic Dipole Moment, Torque and Equilibrium of Current-Carrying Loops

  A circular coil ABCD carrying a current i is placed in a uniform magnetic field. If the magnetic force on segment AB is F⃗, the force on the remaining segment BCDA is:

  Options

  • Option A

    -F⃗

  • Option B

    3F⃗

  • Option C

    -3F⃗

  • Option D

    F⃗

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  NEET 2013NEET Previous Year

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• MCQeasyMagnetic effect of currentMagnetic Dipole Moment, Torque and Equilibrium of Current-Carrying Loops

  Current sensitivity of a galvanometer is 5 divisions per mA and its voltage sensitivity is 20 divisions per volt. Determine its resistance.

  Options

  • Option A

    250 Ω

  • Option B

    25 Ω

  • Option C

    40 Ω

  • Option D

    500 Ω

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  NEET 2018NEET Previous Year

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• MCQmediumMagnetic effect of currentMagnetic Dipole Moment, Torque and Equilibrium of Current-Carrying Loops

  A square current-carrying loop lies in a uniform magnetic field in the plane of the loop. If the magnetic force on one arm is F⃗, find the net magnetic force on the remaining three arms.

  Options

  • Option A

    3F⃗

  • Option B

    -F⃗

  • Option C

    -3F⃗

  • Option D

    F⃗

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  AIPMT Screening 2010NEET Previous Year

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• NumericmediumMagnetic effect of currentMagnetic Dipole Moment, Torque and Equilibrium of Current-Carrying Loops

  A circular coil having 200 turns, 2.5 × 10⁻⁴ m² area and carrying 100 μA current is placed in a uniform magnetic field of 1 T. Initially the magnetic dipole moment M was directed along B. Amount of work, required to rotate the coil through 90° from its initial orientation such that M becomes perpendicular to B, is _________ μJ.

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  JEE Mains 2024 06 Apr Morning Shift

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• MCQmediumMagnetic effect of currentMagnetic Dipole Moment, Torque and Equilibrium of Current-Carrying Loops

  A plane current loop of area A carries current I. What is the magnitude of its magnetic dipole moment?

  Options

  • Option A

    IA

  • Option B

    I/A

  • Option C

    IA²

  • Option D

    I²A

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• MCQmediumMagnetic effect of currentMagnetic Dipole Moment, Torque and Equilibrium of Current-Carrying Loops

  The number of turns of the coil of a moving coil galvanometer is increased in order to increase current sensitivity by 50%. The percentage change in voltage sensitivity of the galvanometer will be:

  Options

  • Option A

    100%

  • Option B

    50%

  • Option C

    75%

  • Option D

    0%

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  JEE Mains31 January 2023Shift 2Evening Shift

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