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Question
If \[N\] is the total number of turns and \[A\] is the area of each turn, which formula gives the solenoid's magnetic moment?
Options
\[m=I/(NA)\]
\[m=NI/A\]
\[m=NIA\]
\[m=NA/I\]
MCQ
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Solution
The magnetic moment equals total turns × current × area. Using \[N\] for total turns and \[A\] for area gives \[m=NIA\].
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