the intensity of the magnetic induction field at the centre of a single turn circular coil of radius 5 cm carrying current of 0.9 A is

Options

A. `36 pi xx 10^(-7) T`
B. `9 pi xx 10^(-7) T`
C. `36 pi xx 10^(-6) T`
D. `9 pi xx 10^(-6) T`

Answer

A

Explanation

The intensity of magnetic induction field
`B = (mu_0 i)/(2 r)`
`= (4 pi xx 10^(-7) xx 0.9)/(2 xx 5 xx 10^(-2))`
`B = 36 pi xx 10^(-7) T`