An iron rod of volume and relative permeability 1000 is placed as core in a solenoid…

PHYSICS · Single correct · CBSE · Physics · Magnetism and Matter · Magnetism and Matter

Problem

An iron rod of volume 10−3 m310^{-3} \text{ m}^3 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) 50×102 Am250 \times 10^2 \text{ Am}^2 (2) 5×102 Am25 \times 10^2 \text{ Am}^2 (3) 500×102 Am2500 \times 10^2 \text{ Am}^2 (4) 0.5×102 Am20.5 \times 10^2 \text{ Am}^2

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