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A closely wound solenoid of 800 turns an...

A closely wound solenoid of 800 turns and area of cross section `2*5xx10^-4m^2` carries a current of `3*0A`. Explain the sense in which the solenoid acts like a bar magnet. What is its associated magnetic moment?

Text Solution

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Here, `n=800`, `A=2*5xx10^-4m^2`. `I=3*0A`
A magnetic field develops along the axis of the solenoid. Therefore, the current carrying solenoid behaves like a bar magnet.
`M=nIA=800xx3*0xx2*5xx10^-4=0*6JT^-1`, along the axis of solenoid.
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