MDCAT Physics MCQ #558

A filament lamp's IV curve becomes steeper with temperature. Why?

MDCAT Physics MCQ #558

  1. Question 1

    Q1. A filament lamp's IV curve becomes steeper with temperature. Why?

    • A) Resistance decreases
    • B) Resistivity becomes zero
    • C) Resistance increases
    • D) Charge density drops

    Answer: Resistance increases

    Explanation: Higher temperature increases resistance of metal filaments. Option A applies to semiconductors.