A Toroid Is Made of 2000 Turns of Wire of Radius

question 25

Multiple Choice

A toroid is made of 2000 turns of wire of radius 2.00 cm formed into a donut shape of inner radius 10.0 cm and outer radius 14.0 cm.When a 30.0-A current is present in the toroid, the magnetic field at a distance of 11.0 cm from the centre of the toroid is:

• A)0.0857 T.
• B)0.109 T.
• C)0.120 T.
• D)0.600 T.
• E)0.685 T.

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