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Force on a straight wire or a side of a loop in a uniform field

This type of question, asked 4 times: 28 Jul 2022, 24 Jan 2023, 30 Jan 2024, 3 Apr 2025. All 4 questions below, oldest first.

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  1. Question 1

    28 Jul 2022

    102
    A triangular shaped wire carrying 10 A10\text{ }A current is placed in a uniform magnetic field of 0.5 T0.5\text{ }T, as shown in figure. The magnetic force on segment CDCD is (Given BC=CD=BD=5 cmBC = CD = BD = 5\text{ }cm ).

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  2. Question 2

    24 Jan 2023

    116
    A single turn current loop in the shape of a right-angle triangle with sides 5 cm,12 cm,13 cm5\text{ }cm,12\text{ }cm,13\text{ }cm is carrying a current of 2 A2\text{ }A. The loop is in a uniform magnetic field of magnitude 0.75 T0.75\text{ }T whose direction is parallel to the current in the 13 cm13\text{ }cm side of the loop. The magnitude of the magnetic force on the 5 cm5\text{ }cm side will be x130 N\frac{x}{130}\text{ }N. The value of xx is

  3. Question 3

    30 Jan 2024

    21
    The horizontal component of earth's magnetic field at a place is 3.5×10−5 T3.5 \times10^{- 5}\text{ }T. A very long straight conductor carrying current of 2A\sqrt{2}A in the direction from South east to North West is placed. The force per unit length experienced by the conductor is ………×10−6 N/m\ldots\ldots\ldots \times10^{- 6}\text{ }N/m.

  4. Question 4

    3 Apr 2025

    22
    A 4.0 cm long straight wire carrying a current of 8A is placed perpendicular to an uniform magnetic field of strength 0.15 T . The magnetic force on the wire is ____\_\_\_\_ mN.