An iron rod of volume 
and relative permeability 
is placed as core in a solenoid with 
. If a current of 
is passed through the solenoid, then the magnetic moment of the rod will be
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
A
JEE Main 2020
Here
Relative permeability
. of turns
Current
Aea of cross section
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