Question

common schools uncom sch of charge to such a degree that the current ceases and the bulb no longer lights. there must be a closed conducting loop from the positive to the negative terminal in order to establish a circuit and to have a current. the importance of a closed conducting loop and no lit bulb. next time you find a broken bulb in a lamp, safely remove it and inspect the filament. often times, shaking the removed bulb will cause a rattle, the filament has likely fallen off the supporting posts that it normally rests upon to the bottom of the glass globe. when shook, you will hear the rattle of the filament hitting the glass globe. 1. why is it necessary for a circuit to be closed in order for it to work? explain with evidence from the text.

Explanation:

A closed - circuit is necessary for current to flow. As stated in the text, "There must be a closed conducting loop from the positive to the negative terminal in order to establish a circuit and to have a current." When the circuit is open, such as when a light - bulb filament breaks or becomes loose, the closed conducting loop no longer exists, and the current ceases, causing the bulb to no longer light.

Answer:

A closed circuit is necessary for a circuit to work because it allows current to flow. Evidence from the text is that when the circuit is open (e.g., a broken light - bulb filament), the closed conducting loop is lost, current stops, and the bulb doesn't light.