An iron rod of volume
Question:

An iron rod of volume $10^{-3} \mathrm{~m}^{3}$ and relative permeability 1000 is placed as core in a solenoid with 10 turns/cm. If a current of $0.5 \mathrm{~A}$ is passed through the solenoid, then the magnetic moment of the rod will be :

  1. $0.5 \times 10^{2} \mathrm{Am}^{2}$

  2. $50 \times 10^{2} \mathrm{Am}^{2}$

  3. $500 \times 10^{2} \mathrm{Am}^{2}$

  4. $5 \times 10^{2} \mathrm{Am}^{2}$


Correct Option: , 4

Solution:

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