whose axis makes an angle 
with a uniform magnetic field 
the quantity 
[P4.4]
loosely is: the 'amount of magnetic field' enclosed by a circuit. [P4.4]
more precisely is: for a loop of area whose axis makes an angle with a uniform magnetic field the quantity [P4.4]
has as its SI unit: the weber (Wb), where 
[P4.4]
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