13 What is the reluctance of a material that has a length of 0 07 m, a cross-sectional area - Physics - Electromagnetic Induction

Question

13   W h a t   i s   t h e   r e l u c tan c e
  o f   a   m a t e r i a l   t h a t   h
a s   a   l e n g t h   o f   0 07   m ,
  a   c r o s s - s e c t i o n a l   a r e a  
o f     0 014   m 2 ,   a n d   a   p
e r m e a b i l i t y   o f   4 , 500     W b /
A t   x   m ? 1   111   A t / W b 2   11
  A t / W b 3   0 001111   A t / W b 4   1
  A t / W b

Anshu Agrawal · Accepted Answer

Dear student,
Reluctance S=lμAS=0 070 014×4500S=0 00111At/Wb

Option 3 is correct
Regards

13 . W h a t i s t h e r e l u c tan c e o f a m a t e r i a l t h a t h a s a l e n g t h o f 0 . 07 m , a c r o s s - s e c t i o n a l a r e a o f 0 . 014 m 2 , a n d a p e r m e a b i l i t y o f 4 , 500 W b / A t x m ? 1 111 A t / W b 2 11 A t / W b 3 0 . 001111 A t / W b 4 1 A t / W b

$13 . W h a t i s t h e r e l u c \tan c e o f a m a t e r i a l t h a t h a s a l e n g t h o f 0.07 m, a c r o s s - s e c t i o n a l a r e a o f 0.014 m^{2}, a n d a p e r m e a b i l i t y o f 4, 500 W b / A t x m ? (1) 111 A t / W b (2) 11 A t / W b (3) 0.001111 A t / W b (4) 1 A t / W b$