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Magnetostatics

a copper ring...

Question

a copper ring and a wooden ring of thesame dimensions are placed such that there is the same changing magnetic flux through each . if the induced emfse_c and e_w in the copper and wooden rings and I_c and Iw be the induced currents respectively , then justify thate_c= e_w andIc is not equal toIw

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Solution

$I_{C} i s n o t e q u a l t o I_{w} b e c a u s e I_{w} = 0, a s c u r r e n t c a n n o t p a s s t h r o u g h n o n c o n d u c t i n g b o d y s u c h a s w o o d . T h e r e f o r e t h e r e i s n o i n d u c e d e m f a c r o s s w o o d e n r i n g, s o e_{c} i s a l s o n o t e q u a l t o e_{c} .$

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