An iron rod of volume 10−4m3 and relative permeability 1000 is placed inside a long solenoid wound with 5 turns/cm. If a current of 0⋅5A is passed through the solenoid, find the magnetic moment of the rod.

Question:

An iron rod of volume 10⁻⁴m³and relative permeability 1000 is placed inside a long solenoid wound with 5 turns/cm. If a current of 0⋅5A is passed through the solenoid, find the magnetic moment of the rod.

Options :

(a)12Am²
(b)15Am²
(c)20Am²
(d)25Am²

Answer :

Ans :- (d)25Am²

Answer Steps :

Step 1:-

Step 2:-

Step 3:-

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