How does the magnetic field due to a long straight wire carrying current vary with distance from the wire, ?
Homework Answers
a) The magnetic field due to long straight wire is,
$$ B=\frac{\mu_{o} I}{2 \pi r} $$
That is magnetic field is inversely proportional to distance from the wire
$$ B \alpha \frac{1}{r} $$
That is the correct option is last option
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