KVPY SX SB Exam 2013 Question Paper

Question : 28 of 120

Marks: +1, -0

An arrangement with a pair of quarter circular coils of radii r and R with a common centre C and carrying a current I is shown.

The permeability of free space is

µ_0

. The magnetic field at C is

Solution:

B due to Arc

= {\µ_0\i\θ}/{4\π\r}

{\µ_0\i}/8[1/\r-1/\R]

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