First slide

Toroid

Question

The average radius of an air cored toroid is 0.1 m and it has 500 turns. If it carries 0.5 ampere current, then the magnetic field inside it is :

Moderate

A

$5 x 10^{- 4} t e s l a$
B

$5 x 10^{- 3} t e s l a$
C

$5 x 10^{- 2} t e s l a$
D

$2 x 10^{- 3} t e s l a$

Solution

$m a g n e t i c f i e l d d u e t o a t o r o i d \frac{μ_{0} N I}{2 π R} w h e r e N i s t h e t o t a l n o o f t u r n s a n d R i s t h e m e a n r a d i u s B = \frac{4 π x 10^{- 7} 500 x 0.5}{2 π 0.1} = 5 x 10^{- 4}$

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