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In a long staright solenoid with cros...

In a long staright solenoid with cross-sectional radius `a` and number of turns per unit length `n` a current varies with a constant velocity` dotI A//s`. Find the magntidue of the eddy current field strength as a function of the distance `r` from the solenoid axis. Draw the appoximate plot of this function.

Text Solution

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The correct Answer is:
For `r lt a, (1)/(2)rmu_(0) " nl and for " r gt a, (1)/(2)(a^(2)mu_(0)nI)/(r )`
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