Consider a toroid with rectangular cross section, of inner radius 
, outer radius 
and height 
, carrying 
number of turns: Then the self-inductance of the toroidal coil when current 
passing through the toroid is
Text Solution
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Magnetic field at a distance 
from centre inside a rectangular toroid
Consider cross-sectional area
Magnetic flux passing through the cross-section of toroid.
When a beam strikes a surface at an angle at incidence 
radiation presence it exerts in surface is given by
…… (i)
Now, self-inductance of rectangular toroid,
From eqn. (i) and (ii)
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