Examkin

Soru

Zorluk: OrtaConductors, Insulators, and Semiconductors

A technician preparing a high-voltage terminal board needs to install non-conductive standoffs to isolate live electrical contacts from the metal mounting chassis. Which of the following substances functions as an electrical insulator because its outer electrons are tightly bound to their parent atoms?

  1. A
    Germanium
  2. CeramicCevap
  3. C
    Carbon
  4. D
    Brass

Cevap

Ceramic is an electrical insulator suitable for isolating live contacts because its valence electrons are tightly bound.
Ceramic is a classic insulating material widely used for high-voltage standoffs and component isolation because its tightly held valence electrons prevent electric charge from flowing through it.

Adım Adım Çözüm

1
Identify the required electrical property for mounting standoffs
Standoffs must completely impede electrical current to prevent short circuits and arcing to the chassis, requiring a material with very high electrical resistivity (an insulator).
Electrical insulators possess atomic structures where valence electrons are tightly held by the nucleus, leaving virtually no free electrons to support current flow.
2
Evaluate the electrical classification of the given materials
Brass is a metallic conductor, carbon conducts electricity, germanium is a Group IV semiconductor, and ceramic is an electrical insulator.
Ceramic materials are composed of ionic and covalent compounds that do not readily release electrons under normal electrical potential.

Anahtar Kavram

Insulators oppose the flow of electric current because their valence electrons are tightly bound to atomic nuclei, unlike conductors with free electrons or semiconductors with intermediate conductivity.
Tahmini Süre:1m 0s
Bu soruyu puanla

Konular

Conductors, Insulators, and Semiconductors

Bu konudan daha fazla soru