Question

A solenoid has 1000 turns per metre and carries a current of 2 A. What is its magnetic intensity?

Options

• \[2\times10^3\,\mathrm{T}\]

• \[2\times10^3\,\mathrm{A/m}\]

• \[4\times10^2\,\mathrm{A/m}\]

• \[5\times10^2\,\mathrm{A/m}\]

Answer 1

Use \[H=nI\] with \[n=1000\,\mathrm{m}^{-1}\] and \[I=2\,\mathrm{A}\]. This gives \[H=1000\times2=2\times10^3\,\mathrm{A/m}\].