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MHT CET 2024 (11 May, Shift 1) · Magnetic Field of Straight Wires

Magnetic Field of Straight Wires question from MHT CET 2024 (11 May, Shift 1)

Q28MHT CET 2024 · 11 MAY · SHIFT 1Easy

Magnetic Field of Straight Wires

Two long straight parallel wires are separated by a distance '2d'. Each wire carries a current 'I' in the same direction. The magnetic field at a point 'P' midway between them is

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Answer: (b)

Same-direction currents produce opposite fields at the midpoint.
Equal currents at equal distance $d$ give equal magnitudes $\frac{\mu_0 I}{2\pi d}$ , which cancel.
So the answer is (b) zero.

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