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Q.

A toriod has a core (non-ferromagnetic) of inner radius 25cm and outer radius 26cm, around which 3500 turns of a wire are wound. If the current in the wire is 5.5A, the magnetic field in the empty space surrounded by the toroid is

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a

3 x 10-2 T

b

zero

c

1.5 x 10-2 T

d

6 x 10-2 T

answer is C.

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Detailed Solution

Magnetic field in the empty space surrounded by toroid = 0.

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