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Bukhovtsev-et-al-Problems-in-Elementary-Physics

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350<br />

ANSWERS AND SOLUTIONS<br />

; t<br />

B<br />

If there is no potenti<strong>al</strong> difference,<br />

the electrostatic field <strong>in</strong>side<br />

the r<strong>in</strong>g is zero. The current<br />

is produced by the e.m.I, of <strong>in</strong>duction<br />

uniformly distributed<br />

<strong>al</strong>ong the r<strong>in</strong>g:<br />

I=!l...=

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