Question

Rank the following coils in order of increasing inductance: Coil A Solenoid, 2 turns/cm, 40 turns...

Rank the following coils in order of increasing inductance:

Coil A Solenoid, 2 turns/cm, 40 turns total and cross sectional area of core = 1.0cm2

Coil B Solenoid, 1 turn/cm, 50 turns total and cross sectional area of core = 2.0cm2

Coil C toroid, 40 turns on 0.4 cm high core with outer radius e=2.71828 cm, inner radius 1.0 cm. so ln(r2/r1) = 1.

Group of answer choices

1) A<B<C

2) A<C<B

3) C <A< B

4) B<C<A

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