Question

What is the magnetic flux through one turn of the long solenoid?

Options

• \[\Phi_B=NBA=\mu_0nNIA\]

• \[\Phi_B=BI=\mu_0nI^2\]

• \[\Phi_B=B A=\mu_0nIA\]

• \[\Phi_B=\frac{B}{A}=\frac{\mu_0nI}{A}\]

Answer 1

Flux through one turn is magnetic field times cross-sectional area. Substituting \[B=\mu_0nI\] gives \[\Phi_B=\mu_0nIA\].