An iron rod of volume 10–3m3 and relative permeability 1000 is placed as core in a solenoid with 10 turns/cm. If a current of 0.5 A is passed through the solenoid, then the magnetic moment of the rod will be: 1) 0.5 × 102 Am2 2) 50 × 102 Am2 3) 5 × 102 Am2 4) 500 × 102 Am2

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