Inductance Practice Test

An ideal air-core solenoid has $$N$$ turns, a length $${\ell}$$, and a cross-sectional area $$A$$. If the number of turns is tripled to $$3N$$ while the length and area remain constant, the new inductance will be...

An ideal solenoid of length $${\ell}$$ and radius $$r$$ has $$N$$ turns of wire. Assuming the solenoid is long enough that end effects are negligible, its self-inductance is proportional to...