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Exercise:
A circuit connected to a VO socket is protected with a IO fuse. How many PO light bulbs can be connected in parallel before the fuse blows? Is there a limit to the number of light bulbs in series?

Solution:
The current through a single light bulb is given by I_ fracPDelta V For N parallel light bulbs we thus get sscItot N I_ NfracPDelta V Solving for N leads to N NF fracItimes VP N approx resultNP If N light bulbs are connected in series the voltage per light bulb is Delta V_ fracDelta VN For an increasing number of light bulbs the voltage per light bulb decreases and therefore the common current is always smaller than I_. The fuse will not blow in this case.
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Exercise:
A circuit connected to a VO socket is protected with a IO fuse. How many PO light bulbs can be connected in parallel before the fuse blows? Is there a limit to the number of light bulbs in series?

Solution:
The current through a single light bulb is given by I_ fracPDelta V For N parallel light bulbs we thus get sscItot N I_ NfracPDelta V Solving for N leads to N NF fracItimes VP N approx resultNP If N light bulbs are connected in series the voltage per light bulb is Delta V_ fracDelta VN For an increasing number of light bulbs the voltage per light bulb decreases and therefore the common current is always smaller than I_. The fuse will not blow in this case.
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Attributes & Decorations
Branches Direct Current
Tags light bulb, resistor, series circuit
Content image
Difficulty
(1, default)
Points
0 (default)
Language ENG (English)
Type Calculative / Quantity
Creator by
Decoration