Question:
A length of wire carries a steady current It is bent first
Last updated: 6/7/2023
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A length of wire carries a steady current It is bent first to form a circular coil of one turn The same length is now bent more sharply to give a double loop of smaller radius The magnetic field at the centre caused by the same current is Select an answer A B C D a quarter of its first value unaltered four times of its first value half of its first value