a) What is magnetic field?(b) Draw magnetic field lines around a bar magnet.(c) Write down four characteristics of magnetic field lines.(d) State the rule for finding the direction of magnetic field associated
Why can't an iron bar produce magnetic flux just by passing current through it instead of wrapping the wire around the bar? - Quora
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![electromagnetism - Does magnetic poles exist for a magnetic field generated by straight current carrying conductor? - Physics Stack Exchange electromagnetism - Does magnetic poles exist for a magnetic field generated by straight current carrying conductor? - Physics Stack Exchange](https://i.stack.imgur.com/0YDzp.gif)