Skin and proximity effects

Which effect occurs in a conductor carrying an alternating current when the frequency of the current increases?

• Skin effect
• Proximity effect
• Faraday effect
• Kirchhoff's effect

Which effect is responsible for increasing the resistance of a conductor carrying an alternating current?

• Skin effect
• Proximity effect
• Joule effect
• Faraday effect

At which frequency does the skin effect become prominent in a copper conductor?

• 50 Hz
• 100 Hz
• 500 Hz
• 1000 Hz

Which of the following is not a factor affecting the magnitude of the skin effect?

• Conductor length
• Conductor diameter
• Frequency of the current
• Permeability of the conductor

What is the main cause of the proximity effect?

• Inductance of the conductor
• Capacitance of the conductor
• Mutual inductance between conductors
• Resistance of the conductor

The proximity effect is more pronounced in conductors that are

• parallel to each other
• perpendicular to each other
• at right angles to each other
• touching each other

Which technique is used to mitigate the skin and proximity effects in high-frequency circuits?

• Twisted pair
• Shielding
• Frequency division
• Phase reversal

In which application is the skin effect most critical?

• Power transmission lines
• Audio signal cables
• Coaxial cables
• Ethernet cables

Which type of conductor is used to reduce the skin effect in high-frequency circuits?

• Solid conductor
• Hollow conductor
• Litz wire
• Ribbon cable

The proximity effect is more pronounced when the separation between conductors is

• large
• small
• medium
• zero