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For questions that utilize the concept of magnetic fields (commonly denoted by the letter B), or for questions whose answers likely involve magnetic fields. More specific than the [tag:magnetism], as questions about the phenomenon & theory of magnetism do not necessarily involve the discussion of fields.

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I know that magnetic field lines are radial in a galvanometer because of the soft iron core. My question is if they are indeed radial then they should meet at the centre of the cylindrical iron core, …
asked Jan 19 by sheshin