Correct Answer - Option 2 : length of the conductor
The correct answer is option 2) i.e. length of the conductor
CONCEPT:
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Magnetic field due to a straight current-carrying conductor: Biot-Savart Law
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Magnetic field B at a radial distance r, due to a wire carrying current is given by:
\(B = \frac{μ_0I}{2π r}\)
Where μ0 is the permeability of free space (4π × 10-7 Tm/A), and I is the current intensity.
EXPLANATION:
The magnetic field due to a long straight current-carrying wire is given by:
\(B = \frac{μ_0I}{2π r}\).
- Magnetic field B is dependent on the current (I) and radial distance from the wire (r).
- Therefore, the magnetic field is independent of the length of the conductor.
