What is a potential effect of the skin effect in conductors?

• A. Increased resistance
• B. Decreased capacitance
• C. Lower temperature
• D. Increased current flow

Answer: (A)

The skin effect is an electromagnetic phenomenon that occurs in conductors when they carry alternating current (AC). As the frequency of the current increases, the current density becomes concentrated near the surface of the conductor rather than being evenly distributed throughout its cross-sectional area. This results in a decrease in the effective cross-sectional area through which the current can flow.

Due to the reduced area, the resistance of the conductor effectively increases with higher frequencies. This is because resistance is inversely related to the cross-sectional area: as the area decreases, resistance increases. Therefore, the skin effect leads to an increase in the effective resistance of the conductor at higher AC frequencies.

In contrast, other options such as decreased capacitance, lower temperature, or increased current flow do not accurately represent the effects of the skin effect on conductors. The skin effect specifically relates to how current distribution changes with frequency and predominantly increases resistance in a conductor as frequency rises.