Question

Which expression gives the magnetic induction of a solenoid core using relative permeability?

Options

• \[B=\frac{H}{\mu_r\mu_0}\]

• \[B=\mu_r\mu_0H\]

• \[B=\frac{\mu_rH}{\mu_0}\]

• \[B=\mu_r\mu_0M\]

Answer 1

From \[\mu_r=\frac{\mu}{\mu_0}\], permeability can be written as \[\mu=\mu_r\mu_0\]. Substituting this into \[B=\mu H\] gives \[B=\mu_r\mu_0H\].