When you turn on a light switch, which of the following is true?
A. Light is generated almost instantaneously from electrons travelling extremely fast, released from the switch and going through the lamp filament.
B. Light is generated from electrons travelling extremely fast from the power plant through to the outlet, then on to the lamp.
C. The electrons already present in the lamp filament generate the light, sensing the electric field signal almost instantaneously.
D. The electrons already present in the lamp filament generate the light, leaving the entire circuit positively charged.
Answer:C
When you turn on a light switch, which of the following is true?
A. Light is generated almost instantaneously from electrons travelling extremely fast, released from the switch and going through the lamp filament. B. Light is generated from electrons travelling extremely fast from the power plant through to the outlet, then on to the lamp. C. The electrons already present in the lamp filament generate the light, sensing the electric field signal almost instantaneously. D. The electrons already present in the lamp filament generate the light, leaving the entire circuit positively charged.