First slide

Magnetic field due to a straight current carrying wire

Question

The value of the magnetic field at a distance x from along straight current-carrying conductor is proportional to :

Moderate

A

x
B

x²
C

1/x²
D

1/x

Solution

Magnetic field due to a long straight current carrying wire at a distance x = $\frac{μ_{o} i}{2 πx}$
Hence magnetic field is inversely proportional to the distance x from the wire

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