MDCAT Physics MCQ #1287

A student observes that a diode conducts electricity only when the anode is connected to the positive terminal. What explains this directional conduction?

MDCAT Physics MCQ #1287

  1. Question 1

    Q1. A student observes that a diode conducts electricity only when the anode is connected to the positive terminal. What explains this directional conduction?

    • A) The p-type material has a higher density of free electrons.
    • B) The depletion region widens under forward bias.
    • C) Covalent bonds in the semiconductor break under reverse bias.
    • D) Majority charge carriers are repelled by the same polarity applied to the terminal.

    Answer: Majority charge carriers are repelled by the same polarity applied to the terminal.

    Explanation: Majority carriers flow when attracted to opposite polarity; option C confuses bond behavior with conduction mechanism.