464. Problem 35.21 (RHK) In the figure cross-section has been shown of a long thin
ribbon of width w that is carrying a uniformly distributed total current
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Solution: Click For PDF Version We imagine the ribbon to be comprising of many, long, thin, parallel wires
each of thickness
The magnetic field at P due to a wire element
Therefore, the magnetic field at P due to the ribbon with current
For calculating the above integral, we make the substitution We get
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