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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

Verified by Experts

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

  • A circular coil with a cross-sectional area of 4cm^(2) has 10 "turns" / cm . It is placed at the centre of a long solenoid that has 15 "turns" / cm and a cross-sectional area of 10 cm^(2). The axis of the coil coincides with the axis of the solenoid. What is their mutual inductance ?

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    `10.54muH`

  • A circular coil with a cross-sectional area of 4 cm^(2) has 10 turns. It is placed at the centre of a long solenoid that has 15 truns/cm and a cross-sectional area of 10 cm^(2) . The axis of the coil coincides with the axis of the solenoid. What is their mutual inductance?

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    `7.54 muH`
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