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Mean radius of a toroid is 10 cm and num...

Mean radius of a toroid is 10 cm and number of turns is 500. If current flowing through it is 0.1 A then value of magnetic induction (in tesla) for toroid is

A

`10^(-2)`

B

`10^(-4)`

C

`10^(-3)`

D

`10^(-4)`

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