An iron rod of volume 10-4 m3 acquires a magnetic moment of 25 A∙m2 when placed inside a solenoid whose windings carry a current of 0.5 A. The magnetization of the rod (in A/m), assumed to be uniform, is
A. 5 × 10-5
B. 2.5 × 10-3
C. 12.5
D. 2.5 × 105
Answer:D
An iron rod of volume 10-4 m3 acquires a magnetic moment of 25 A∙m2 when placed inside a solenoid whose windings carry a current of 0.5 A. The magnetization of the rod (in A/m), assumed to be uniform, is
A. 5 × 10-5 B. 2.5 × 10-3 C. 12.5 D. 2.5 × 105