Question
Which of the following graph represents the variation of magnetic flux density $B$ with distance $r$ for a straight long wire carrying an electric current?
Step 1
This can be mathematically represented as: \[ B = \frac{\mu_0I}{2\pi r} \] where \( B \) is the magnetic field, \( \mu_0 \) is the permeability of free space, \( I \) is the current, and \( r \) is the distance from the wire. Show more…
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