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Asked by Maliha Last Modified
Answer Inner radius of the toroid, r1 = 25 cm = 0.25 m
Outer radius of the toroid, r2 = 26 cm = 0.26 m
Number of turns on the coil, N = 3500
Current in the coil, I = 11 A
(a) Magnetic field outside a toroid is zero. It is non-zero only inside the core of a toroid.
(b) Magnetic field inside the core of a toroid is given by the relation,
B = 
Where,
= Permeability of free space = 
l = length of toroid
(c) Magnetic field in the empty space surrounded by the toroid is zero.
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