Magnetic Force on Current carrying conductor questions with solutions

Showing 1–10 of 26 questions

• NumericmediumMagnetic effect of currentMagnetic Force on Current carrying conductor

  A 2A current carrying straight metal wire of resistance 1 Ω, resistivity 2 × 10⁻⁶ Ωm, area of cross-section 10 mm² and mass 500 g is suspended horizontally in mid air by applying a uniform magnetic field B. The magnitude of B is ______ × 10⁻¹ T (given, g = 10 m/s²)

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  JEE Mains 2024 05 Apr Morning Shift

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• MCQmediumMagnetic effect of currentMagnetic Force on Current carrying conductor

  A massless square loop, of wire of resistance 10 Ω, supporting a mass of 1 g, hangs vertically with one of its sides in a uniform magnetic field of 10³ G directed outwards in the shaded region. A dc voltage V is applied to the loop. For what value of V will the magnetic force exactly balance the weight of the supporting mass? [Side of loop = 10 cm, g = 10 m s⁻²]

  

  Options

  • Option A

    0.1 V

  • Option B

    100 V

  • Option C

    1 V

  • Option D

    10 V

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  JEE Mains30 January 2023Shift 1Morning Shift

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• NumericmediumMagnetic effect of currentMagnetic Force on Current carrying conductor

  A single turn current loop in the shape of a right angle triangle with sides 5 cm, 12 cm, 13 cm is carrying a current of 2A. The loop is in a uniform magnetic field of magnitude 0.75 T whose direction is parallel to the current in the 13 cm side of the loop. The magnitude of the magnetic force on the 5 cm side will be x/130 N. The value of x is ___________.

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  JEE Mains24 January 2023Shift 2Evening Shift

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• Multi-correctmediumMagnetic effect of currentMagnetic Force on Current carrying conductor

  An arbitrary current-carrying wire joins fixed endpoints A and B in a uniform magnetic field. Which statements are correct?

  Select all that apply

  • Option A

    Its net force is I L×B, where L points from A to B.

  • Option B

    The detailed path does not affect the net force.

  • Option C

    Changing the path while keeping endpoints fixed leaves the net force unchanged.

  • Option D

    The same endpoint rule is generally valid in a non-uniform magnetic field.

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• Multi-correctmediumMagnetic effect of currentMagnetic Force on Current carrying conductor

  For two long parallel current-carrying conductors, which statements are correct?

  Select all that apply

  • Option A

    Same-direction currents attract.

  • Option B

    Opposite-direction currents repel.

  • Option C

    Force per unit length varies as 1/d.

  • Option D

    Doubling both currents quadruples the force per unit length.

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• Multi-correctmediumMagnetic effect of currentMagnetic Force on Current carrying conductor

  A closed current loop is placed completely in a uniform magnetic field. Which statements are correct?

  Select all that apply

  • Option A

    The net magnetic force on the loop is zero.

  • Option B

    The torque can be non-zero.

  • Option C

    Individual elements of the loop can experience non-zero forces.

  • Option D

    A non-zero torque requires a non-zero net force.

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• MCQmediumMagnetic effect of currentMagnetic Force on Current carrying conductor

  Three infinitely long parallel wires are equally spaced along a straight line. The two outer wires carry equal currents I in the same direction. The middle wire carries a non-zero current. For which direction of the middle current do the forces exerted by the two outer wires cancel?

  Options

  • Option A

    Only the same direction

  • Option B

    Only the opposite direction

  • Option C

    Either direction

  • Option D

    Cancellation is impossible

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• NumericmediumMagnetic effect of currentMagnetic Force on Current carrying conductor

  A square loop of edge length 2 m carrying current of 2 A is placed with its edges parallel to the x-y axis. A magnetic field is passing through the x-y plane and expressed as B = B₀(1 + 4x) k̂, where B₀ = 5 T. The net magnetic force experienced by the loop is _______ N.

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  JEE Mains 2024 09 Apr Morning Shift

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• Multi-correctmediumMagnetic effect of currentMagnetic Force on Current carrying conductor

  A current-carrying straight conductor is placed in a uniform magnetic field. Which statements are correct?

  Select all that apply

  • Option A

    The force can be zero even when current is non-zero.

  • Option B

    The force magnitude is maximum when the conductor is perpendicular to B.

  • Option C

    The force direction follows I L×B.

  • Option D

    If the conductor is parallel to B, the magnetic force is zero.

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• MCQmediumMagnetic effect of currentMagnetic Force on Current carrying conductor

  A rectangular loop carries current I. Only one vertical side of length L lies inside a uniform magnetic field B perpendicular to the plane of the loop; all other sides are outside the field. What is the net magnetic-force magnitude on the loop?

  Options

  • Option A

    ILB

  • Option B

    2ILB

  • Option C

    Zero

  • Option D

    ILB/2

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