14. At any point, empty space surrounded by a toroid, the magnetic field is B1. At any point,
outside the toroid, the magnetic field is B2.
(a) B1>B2 (b) B2 > B1
(C) B1=B2
(d) B1 = B2= 0
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answer is c. At empty space B = 0 , and out side loop cancel current hence I = 0.
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