MDCAT Physics MCQ #541

Why does an incandescent bulb draw higher current when cold compared to hot state?

MDCAT Physics MCQ #541

  1. Question 1

    Q1. Why does an incandescent bulb draw higher current when cold compared to hot state?

    • A) Cold filament has lower resistance
    • B) More free electrons at lower temps
    • C) Voltage increases with heating
    • D) Energy storage requires initial surge

    Answer: Cold filament has lower resistance

    Explanation: Resistance rises with temperature. Option D describes inrush current but not the cause.