A length of wire carries a steady current It is bent first

Last updated: 6/7/2023

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