find the magnetic intensity H at the centre of a long solenoid having n turns per unit length and carrying current i when a copper rod is inserted in the solenoid. why is their no effect of rod in this

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Q. The magnetic field

B

inside a long solenoid, carrying a current of

5.00 A

, is

3.14 \times 10^{- 2} T

. Find the number of turns per unit length of the solenoid.

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.

Q. Draw the magnetic field lines for a current carrying solenoid when a rod made of (i) copper, (ii) aluminium and (iii) iron are inserted within the solenoid as shown.

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)

Q. A long solenoid has

200

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6.28 \times 10^{- 2} W b / m^{2}

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100

turns per cm and it carries a current

I / 3

. The value of the magnetic field at its centre is

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