Question: PLEASE HELP THANK YOU answer this sheet. here's the link: https://docs.google.com/document/d/1uypVsCvv25AhOCX0eFRn1UKtS1XwzTaowCB9S8v13i4/edit?usp=sharing Instruction: Why there is a need for you to replace the bulb soon after
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answer this sheet. here's the link:
https://docs.google.com/document/d/1uypVsCvv25AhOCX0eFRn1UKtS1XwzTaowCB9S8v13i4/edit?usp=sharing
Instruction: Why there is a need for you to replace the bulb soon after burning in a series of decorative lights? Would you rather buy a new one or not?
Lights sets arranged in series cannot remain lit if a bulb burns out. Wiring in parallel can eliminate this problem, but each bulb must then be able to withstand 120 V. To eliminate the drawbacks of either approach, modern light sets typically contain two or three sections connected to each other in parallel, each of which contains bulbs in series. When one bulb is removed from a modern light set, half of one-third of the lights in the set go dark because the bulbs in that section are wired in series. When a bulb burns out, however, all the other bulbs in the set remain lit. How is this possible? Modern decorative bulbs have a short loop of insulated wire called the jumper, that is wrapped around the wires connected to filament. There is no current in the insulated wire when the bulb is functioning properly. When the filament breaks, however, the current in the section is zero and the potential difference across the two wires connected to the broken filament is then 120 V. This large potential difference creates a spark across the two wires that burns the insulation off the small loop of wire. Once that occurs, the small loop closes the circuit, and the other bulbs in the section remain lit, because the small loop in the burnt-out bulb has very little resistance, the equivalent resistance of that portion of the light set decreases, its current increases. This increased current results in a slight increase in each bulb's brightness. As more bulbs burn out, the temperature in each bulb increases and can become a fire hazard; thus, bulbs should be replaced soon after burning out.
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REFERENCE: https://drive.google.com/file/d/1T4NFEWABIUicQ1HJ2-2SfyPylUF6M0wt/view?usp=sharing
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