A closely wound solenoid ofmath xmlns=http://www.w3.org/1998/Math/M...

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A closely wound solenoid ofmath xmlns=http://www.w3.org/1998/Math/MathML class=wrs_chemistrymo /momn2000/mnmo /mo/math turns and area of cross-section \( 1.6 \mathrm{~cm}^{2} \) carries a current of \( 4 \mathrm{~A} \). The magnetic moment associated with the solenoid (in \( \left.\mathrm{Am}^{2}\right) \) is
(1) \( 1.28 \)
(2) \( 2.56 \)
(3) \( 5.12 \)
(4) \( 10.24 \)
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