If we double the radius of a coil keeping the current through it unchanged

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If we double the radius of a coil keeping the current through it unchanged, then the magnetic field at any point at a large distance from the centre becomes approximately
18
Nov
If we double the radius of a coil keeping the current through it unchanged, then the magnetic field at any point at a large distance from the centre becomes approximately If we double the radius of a coil keeping the current through it unchanged then the magnetic field at any point at a large distance [...]
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