MHT CET20227 Aug 2022Morning ShiftPhysicsMagnetic Effects of CurrentActual

A metal wire is of length l has magnetic moment M . What is the new magnetic moment if it is bent in L-shape?

Options

AM 2
B2 M
CM
DM 2

Correct answer

D. M 2

Step-by-step solution

Magnetic wire of length l has magnetic moment M , therefore M=m l where, m is the strength of each monopole. If it is bent into l shape the effective separation between the monopoles changes to l 2 . Therefore, new magnetic moment is: M^ =m ( l 2 )= M 2

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