Q. When the N-pole of a bar magnet advances towards a stationary current carrying circular coil along its axis, its motion is damped. Explain why it is so?

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Solution

$w h e n t h e N p o l e i s m o v e d t o w a r d s t h e c u r r e n t c a r r y i n g c o i l i t i n t e r a c t s w i t h t h e m a g n e t i c f i e l d g e n e r a t e d b y t h e c o i l . t h i s f i e l d o p p o s e t h e m o t i o n o f t h e c o i l a s t h e i n d u c e d m a g n e t i c f i e l d g e n e r a t e t h e i n d u c e d c u r r e n t t h a t s l o w d o w n t h e m a g n e t . t h i s i s l e n z s l a w t h e e n e r g y o f t h e m a g n e t m o v e m e n t w i l l l o s s i n h e a t i n t h e w i r e o r c o n s u m e d i n s o m e o t h e r f o r m . R e g a r d s$

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