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The magnetic intensity H at the centre o...

The magnetic intensity `H` at the centre of a long solenoid carrying a current of `2.0 A`, is found to be `1500 A m^(-1)`. Find the number of turns per centimetre of the solenoid.

Text Solution

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Here `B=mu _0` ni `H=(B)/(mu_0)`
then `H=ni`
`implies 1500 A//m=nxx2`
`impliesn=750 turns turns//meter `
`impliesn=7.5 turns//cm`.
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Knowledge Check

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    A
    is zero
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    decreases as we move towards its end
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  • The magnetic field lines inside a long current-carrying solenoid nearly

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    D
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