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A torroid has a core outer radius $26\;cm$ around which 3500 turns of a wire are wound . If the current in the wire is $11\;A$ , What is the magnetic field in the empty space surrounded by the torroid ?

$\begin{array}{1 1} 0 \\ 1 \\ -1 \\ cannot\;be\determined \end{array} $

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Solution :
In the empty space surrounded by the torriod the magnetic field is zero.
Answer : 0
answered Jul 27, 2015 by meena.p

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