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Advanced Qualification · A-002 Advanced components and circuits · A-002-005-003

When a silicon controlled rectifier (SCR) is triggered, to what other semiconductor diode are its electrical characteristics similar (as measured between its cathode and anode)?

  1. AThe varactor diode
  2. BThe junction diode
  3. CThe PIN diode
  4. DThe hot-carrier (Schottky) diode

Correct answer: B — The junction diode. From the official ISED question bank, verified word for word.

Why

Once triggered, a silicon controlled rectifier acts like a standard junction diode, allowing current to flow freely from anode to cathode while blocking it in the reverse direction. The full explanation — and one for every question — is in Pro.

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Advanced components and circuits is section A-002 of the Advanced exam: Advanced components and circuits: semiconductors, amplifier classes, oscillators, mixers, filters and digital logic.

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