A long solenoid has n turns per meter and current I A is flowing throu – McqOptions

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1.	A long solenoid has n turns per meter and current I A is flowing through it. The magnetic field at the ends of the solenoid is [MP PMT 2001; MP PET 2002]
A.	\[\frac{{{\mu }_{0}}nI}{2}\]
B.	\[{{\mu }_{0}}nI\]
C.	Zero
D.	\[2{{\mu }_{0}}nI\]
Answer» B. \[{{\mu }_{0}}nI\]

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