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A single loop of wire with area A carrying a current I has a magnetic moment µ = IA. If you wanted a single loop of wire with an area equal to the cross-sectional area of the magnet used here to have the same magnetic moment as your permanent magnet, how large a current would you need flowing through the loop?

Respuesta :

Answer:

The current would you need flowing through the loop is

[tex]I'=\frac{\mu 'I}{\mu }[/tex]

Explanation:

The magnetic moment is permanent, the area is equal to:

[tex]A=\frac{\mu }{I}[/tex]

The current is:

[tex]I'=\frac{\mu '}{A}[/tex]

Replacing the area value, the current is:

[tex]I'=\frac{\mu 'I}{\mu }[/tex]

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