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A coil wrapped around a toroid has inner...

A coil wrapped around a toroid has inner radius of `15cm` and outer radius of `20cm`. If the toroid has `1000` turns of wire and carries a current of `12A`, find the maximum and minimum values of magnetic field within the toroid.

Text Solution

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Here, `r_1=15cm=0*15m`,
`r_2=20cm=0*20m`, `N=1000`, `I=12A`
`B_(max)=mu_0(N)/(2pir_1)I=((4pixx10^-7)xx1000xx12)/(2pixx0*15)`
`=1*6xx10^-2T`
`B_(min)=mu_0(N)/(2pir_2)I=((4pixx10^-7)xx1000xx12)/(2pixx0*20)`
`=1*2xx10^-2T`
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