There are electrons in the filament of the ac lamp in your bedroom. When you turn on the lamp and it glows, the glowing comes from A) the positive charges that flow in the filament.B) the same electrons.C) different electrons; the ones that flow in the circuit to your lamp
The glowing in the filament of an AC lamp occurs due to the flow of electrons through the filament. When you turn on the lamp, the electrons that flow in the circuit to your lamp are responsible for generating the light. Therefore, the correct answer is C) different electrons; the ones that flow in the circuit to your lamp.
The glowing in an AC lamp comes from the flow of electric current through the filament. The filament is typically made of a thin wire, usually tungsten, which has a high resistance to electric current. When you turn on the lamp, the potential difference (voltage) across the lamp causes the electric current to flow through the filament.
Now, coming to the question of whether the glowing comes from the same electrons or different electrons, it's important to understand the nature of electrical circuits. In a closed circuit, such as the one in an AC lamp, electric charge flows continuously. In this case, the electric current is carried by free electrons present in the filament.
Initially, when the lamp is turned off, there is no electric current flowing through the filament. However, when you switch on the lamp, the circuit is completed, and electric current starts flowing from the power source to the lamp. This electric current drives the movement of free electrons through the filament.
Therefore, the glowing in the AC lamp comes from different electrons. Initially, the filament is not conducting and there are no free electrons flowing through it. When you turn on the lamp, the electric current causes the flow of new electrons from the power source, through the circuit, and into the filament. These new electrons collide with the atoms in the filament, releasing energy in the form of light, which is what we perceive as the glowing of the lamp.
So, in summary, the glowing in an AC lamp comes from different electrons; the ones that flow in the circuit to your lamp, not from the same electrons present in the filament.