ntA long solenoid has 1500 turns per metre and an iron core of relative permeability =1100 is kept inside it .2A current flows in the coil of solenoid .If core is heated beyond curie temperature then why H field in solenoid is nearly unchanged but B field decreases significantly?n

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Q. A long solenoid has 1000 turns per metre and carries a current of 1A. It has a soft iron core of

μ_{T}

-1000. The core is heated beyond the Curie temperature,

T_{C}

Q. A long solenoid has

1000

turns per metre and carries a current of

1 A

. It has a soft iron core of

μ_{r} = 1000

. The core is heated beyond the curie temperature

T_{c}

. Then

Q. A long solenoid has

500

turns per

metre

and carries a current of

0.5 A

. It has a soft iron core of

μ_{r} = 999

. The core is heated beyond the curie temperature

T_{c}

. Then

[(χ)_{p a r a} \approx 10^{- 5} and (χ)_{F e r r o} \approx 10^{3}]

Q. The magnetic field (B) inside a long solenoid having 'n', turns per unit length and carrying current 'I' when iron core is kept in it is (

μ_{0}

= permeability of vacuum,

χ

= magnetic susceptibility)

A solenoid has a core of a material with relative permeability of 500. The windings of the solenoid are insulted from the core and carry a current of 2A. If the number of turns is 1000 per meter, then magnetisation is ??

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