Chapter 5: Currents and Conductors

Quiz

1. Which statement is not true?

The static electric field in a conductor is zero.

The conductor surface is equipotential.

Zero tangential electric field on the surface of a conductor leads to zero potential difference between points on the surface.

The normally directed electrical field on the surface of a conductor is zero.



2. The “skin” effect results in

Current flowing in the entire volume as frequency increases.

Current flowing only near the surface as frequency increases.

Current flowing only near the surface as frequency decreases.

Current flowing near the surface at any frequency.



3. Proximity effects will not be found in

Two straight conductors.

A single spiral shaped conductor.

A single straight conductor.

Three L-shaped parallel conductors.



4. As frequency increases, skin effect results in

Decreased resistance.

Increased resistance.

No change in resistance.

Increase or decrease depending on material properties.



5. The resistance of a 1609 m (1 mile) length of copper wire with diameter 0.0254 inches and conductivity of S/m

21.21

10.60

42.43

84.86