A) \[A-{{m}^{2}}\]
B) \[A-m\].
C) \[A-{{m}^{-1}}\]
D) \[A-{{m}^{-2}}\]
Correct Answer: B
Solution :
: S.I. unit of pole strength \[=A-m\] \[=Ampere\times metre\].
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