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Field due to two long parallel wires at a point

This type of question, asked 6 times: 29 Jun 2022, 25 Jan 2023, 27 Jan 2024, 4 Apr 2024, 22 Jan 2025, 6 Apr 2026 S2. All 6 questions below, oldest first.

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  1. Question 1

    29 Jun 2022

    99
    Two long current carrying conductors are placed parallel to each other at a distance of 8 cm8\text{ }cm between them. The magnitude of magnetic field produced at mid-point between the two conductors due to current flowing in them is 300μT300\mu T. The equal current flowing in the two conductors is:

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  2. Question 2

    25 Jan 2023

    111
    Two long parallel wires carrying currents 8 A8\text{ }A and 15 A15\text{ }A in opposite directions are placed at a distance of 7 cm7\text{ }cm from each other. A point PP is at equidistant from both the wires such that the lines joining the point PP to the wires are perpendicular to each other. The magnitude of magnetic field at PP is _______×10−6 T\_\_\_\_\_\_\_ \times 10^{- 6}\text{ }T (Given: 2=1.4\sqrt{2}= 1.4 )

  3. Question 3

    27 Jan 2024

    28
    Two long, straight wires carry equal currents in opposite directions as shown in figure. The separation between the wires is 5.0 cm. The magnitude of the magnetic field at a point PP midway between the wires is ______ μT\mu T (Given: μ0=4π×10−7TmA−1\mu_{0}= 4\pi \times10^{- 7}TmA^{- 1} )

  4. Question 4

    4 Apr 2024

    119
    Two parallel long current carrying wire separated by a distance 2r2r are shown in the figure. The ratio of magnetic field at AA to the magnetic field produced at CC is x7\frac{x}{7}. The value of xx is _____ .

  5. Question 5

    22 Jan 2025

    97
    Two long parallel wires X and Y , separated by a distance of 6 cm , carry currents of 5 A and 4 A , respectively, in opposite directions as shown in the figure. Magnitude of the resultant magnetic field at point PP at a distance of 4 cm from wire Y is x×10−5 Tx \times10^{- 5}\text{ }T. The value of xx is ______\_\_\_\_\_\_ . Take permeability of free space as μ0=4π×10−7\mu_{0}= 4\pi \times10^{- 7} SI units.

  6. Question 6

    6 Apr 2026 S2

    13
    A current of 30 A each flows in opposite directions in two conducting wires, placed parallel to each other at a distance of 8 cm . The magnetic field at the midpoint between the two wires is ____\_\_\_\_ μT\mu T. ( μ04π=10−7 N/A2\frac{\mu_{0}}{4\pi}=10^{- 7}\text{ }N/A^{2} )

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