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An iron rod of volume 10^(-4) m^(3) and ...

An iron rod of volume `10^(-4) m^(3)` and relative permeability 900 is placed inside a long solenoid wound with 6 turns/cm. If a current of 0.4 A is passed through the solenoid, the magnetic moment of the rod is

A

0.216 `Am^(2)`

B

2.16 `Am^(2)`

C

21.6 `Am^(2)`

D

`2.16 xx 10^(-2) Am^(2)`

Text Solution

Verified by Experts

The correct Answer is:
C
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