First slide

Magnetic flux and induced emf

Question

A conducting wire is dropped along east-west direction, then

Moderate

A

No emf is induced
B

No induced current flows
C

Induced current flows from west to east
D

Induced current flows from east to west

Solution

$ε = B l v R o d c u t s t h e e a r t h s m a g n e t i c f i e l d (B_{H} i s f r o m S o u t h t o N o r t h) H e n c e f l u x c h a n g e s a n d i n d u c e d e m f i s d e v e l o p e d .$

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