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  • 5.5 A closely wound solenoid of 800 turns and area of cross section 2.5 into 10 raised to minus 4 m raised to 2 carries a current of 3.0 A. Explain the sense in which the solenoid acts like a bar magnet. What is its associated magnetic moment?

A closely wound solenoid of 800 turns and area of cross section 2.5 \times 10 ^{-4} m^2 carries a current of 3.0 A. Explain the sense in which the solenoid acts like a bar magnet. What is its associated magnetic moment?

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In this case the magnetic field is generated along the axis / length of solenoid so it acts as a magnetic bar.

 The magnetic moment is calculated as :- 

                                        M\ =\ NIA

or                                             =\ 800\times 3\times 2.5\times 10^{-4}

or                                              =\ 0.6\ JT^{-1}     

 

Posted by

Devendra Khairwa

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