A toroid has a core (non-ferro magnetic) of inner radius 24 cm and outer radius 26 cm around which 2000 turns of a wire is wound. If the current in the wire is 12 A , the magnetic field inside the core of the toroid is

Question

A toroid has a core (non-ferro magnetic) of inner radius 24 cm and outer radius 26 cm around which 2000 turns of a wire is wound. If the current in the wire is 12 A , the magnetic field inside the core of the toroid is, 1 . 92 × 10 - 2 T, 1 . 88 × 10 - 2 T, 2 . 12 × 10 - 2 T, 1 . 98 × 10 - 2 T

MARKS App · Accepted Answer

Given: r 1 = 24 cm r 2 = 26 cm Mean radius, r = r 1 + r 2 2 = 25 cm = 1 4 m Magnetic field inside the toroid, B = μ 0 n I = μ 0 N 2 π r I = 4 π × 10 - 7 2000 2 π × 1 4 × 12 = 1 . 92 × 10 - 2 T

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