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Standard X

Physics

Magnetic Field Due to Current Carrying Circular Loop

a Square loop...

Question

a Square loop of side 5 cm being moved towards right at a constant speed of 1 cm/s. The front edge enters the 20 cm wide magnetic field at t =0. Find the emf induced in the loop at (a)t=2 s, (b) t =10 s, (c)t =22 and (d)t =30 s.

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Solution

$S i n c e f r o n t e d g e i s e n t e r i n g i n t h e m a g n e t i c f i e l d t h e r e f o r e a n g l e b e t w e e n m a g n e t i c f i e l d a n d t h e a r e a v e c t o r o f t h e l o o p i s 90 d e g r e e t h e r e f o r e \cos 90 = 0 h e n c e f l u x t h r o u g h t h e l o o p i s z e r o t h e r e f o r e n o i n d u c e d e m f w i l l b e t h e r e .$

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a Square loop of side 5 cm being moved towards right at a constant speed of 1 cm/s. The front edge enters the 20 cm wide magnetic field at t =0. Find the emf induced in the loop at (a)t=2 s, (b) t =10 s, (c)t =22 and (d)t =30 s.

Since front edge is entering in the magnetic field therefore angle between magnetic field and the area vector of the loop is 90 degree therefore cos 90 = 0hence flux through the loop is zero therefore no induced emf will be there.