A lamp lights almost instantly when switched on, although drift velocity is tiny, because:

  1. the electric field travels through the circuit at nearly the speed of light, moving all electrons at once
  2. current flows only in the lamp
  3. the lamp stores charge
  4. electrons move at the speed of light
Answer

A) the electric field travels through the circuit at nearly the speed of light, moving all electrons at once

All free electrons start drifting together. SLO P-09-E-10 · Application

Physics MCQ · More Current Electricity MCQs · Practise