Question

Earth's horizontal magnetic field is \[H_E=0.4\,\mathrm{G}\]. What value of \[B\] is used in tesla?

Options

• \[B=4\pi\,\mathrm{T}\]

• \[B=0.4\,\mathrm{T}\]

• \[B=0.4\times10^{-4}\,\mathrm{T}\]

• \[B=0.4\times10^{4}\,\mathrm{T}\]

Answer 1

The field value used in the rotating-wheel calculation is \[B=0.4\times10^{-4}\,\mathrm{T}\]. This converts the given value in gauss to tesla.