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If the paramagnet is replaced by a solen...

If the paramagnet is replaced by a solenoid of cross-sectional area `2 xx 10^(-4) m^(2) and 1000` turns having a magnetic moment `0.50 A.m^(2),` find the current flowing through the solenoid.

Text Solution

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Given, area of cross-section , `A = 2 xx 10 ^(-4) m ^(2)`
Number of turns, `N = 1000`
Magnetic moment, ` M = 0. 50 A- m ^(2)`
We know that , magnetic moment, `M = NlA`
` implies` Current flowing through the solenoid,
`l= (M)/(NA) = ( 0. 50)/( 1000 xx 2 xx 10 ^(-4)) = ( 5 xx 10 ^(3))/( 2000) = 2. 5 A`
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