In toroid magnetic field magnetic field on axis will be radius = 0.5 cm, current = 1.5 A, turns = 250, permeability = 700

Options

A. 7.5 Tesla
B. 10.5 Tesla
C. 4.5 Tesla
D. 15.5 Tesla

Answer

B

Explanation

`B=mu_(0)mu r[(N)/(2pi r)]I`
`B=700 xx 4 pi xx 10^(-7)[(250 xx 100)/(2 xx pi xx 0.5)] xx 1.5 `
`=(1400 xx 10^(-7) xx 25 xx 10^(3) xx 1.5)/( 0.5)`
`=75 xx 1400 xx 10^(-4)` Tesla
`=75 xx 14 xx 10^(-2)` Tesla
`=1050 xx 10^(-2)` Tesla
`=10.5` Tesla