Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [series]

In the case of an electronic circuit, series refers to components connected in such a way that current must pass through each in a single path.

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Two resistors in series

I know the summation equation for two or more resistors in parallel or series, and I know two parallel resistors will give more power. But sometimes I saw some circuits that used two resistors in series, and I am wondering why that method was used…
M.A.K
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Burned out filament but the light bulb has small resistance

The light bulb shown below is from a Christmas tree light string. The string is made up of series connected light bulbs. However if one burns out, the other bulbs keep working. Taking out the bulb from its socket makes all the others in series with…
Cornelius
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Why does current not increase when batteries are connected in parallel?

I built a simple circuit consisting of two battery holders each including x2 1.5 V batteries, a slide switch, a LED and a 100 ohm resistor. The current I measured with a multimeter when the two battery holders were connected in series (and the…
korppu73
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Heat lost in ideal capacitor charging

If we use an ideal capacitor to charge another ideal capacitor, my intuition tells me no heat is generated since capacitors are just storage elements. It shouldn't consume energy. But in order to solve this question, I used two equations…
Aditya P
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Benefits of multiple op-amp gain stages in series?

I'm a bit lost in regards to how multiple op-amps in series will perform. My use case would be the amplification of low-voltage audio signals (4-50mVRMS) to roughly 8VRMS. I only found documentation on how gain will influence the bandwidth-product…
PalimPalim
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Why do batteries in series add up voltage?

This question will probably sound easy to most of you, but to me, it is still a kind of magic :) Taking in account all I know until know, I guess a battery has two sides: one that "emits" electrons (any technical term for that ?) one that "lacks"…
Antoine_935
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Watts - I think I'm getting free energy from a circuit?

Imagine I have a 10V battery with a capacity of 1Ahrs connected to a 100 Ohm resistor. I'll get 0.1A (V/R) at a power of 1W (current x voltage) for a total of 10hrs. As a watt is defined as J/s my battery produces 3,600J (1x60x60) in total. Now,…
user122374
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What is the reason to connect 4 resistors of the same value as 2s2p? (image)

There are 2 parallel branches, each has 2x 10R resistor. It seems to me that the resulting value will be 10R, but I can't wrap my head around why would someone do this if it is not meant to dissipate power (it's meant to be a filter I…
pokornz
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12 V LED strips in series with a 24 V power supply?

I am purchasing 50x - 1 meter / 12 V / 72 LED / Rigid SMD 5730 strips directly from China. I don't know the LED manufacturer, nor the resistor being used. (Yes, this is a gamble.) The strip is one that could be cut at every 3rd LED. So, it seems…
Cody
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Two LEDs connected in series don't work

I'm very new to electrical engineering and I ran into a strange issue while trying to connect two LEDs in series today. Both my blue and white LEDs work separately, but when I try to connect them together, they do not work (see pictures). Is there…
Tomas Zamastil
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Connecting two DC wallwarts in series - to produce dual DC supply

I have two 9 V, 300 mA wallwarts and would like to connect them in series to produce +9 V, 0 V and -9 V. This can be done with two 9 V batteries (as seen below), but can I do this with two non-identical wallwarts?
Jazzmarazz
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Is a two-element circuit series or parallel?

Is the voltage source in series with the resistor or is the voltage source in parallel with the resistor? If the voltage source is in parallel with the resistor, then why do they share the same current? If the voltage source is in series with the…
user53172
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Adding foot control to tig welder

I've got a simple tig welder that uses a switch on the torch to start the welding current and a potentiometer on the front panel to set the amperage. Many welders make use of a foot pedal to start te welding current and also control the amperage…
Aph
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Inserting Capacitor into CIrcuit causes LED to fade - Why?

My components are 2x 1.5 V batteries 25V 2200uF capacitor 3v Led copper cables My circuit looks like the following. simulate this circuit – Schematic created using CircuitLab My understanding here is that as the two batteries are in linked in…
buntybudia
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Can I series windings of separate transformers to increase the voltage rating of the whole?

I need a 1:1 transformer, 25VA 600VAC. I'm not having much luck finding such a thing. It occurs to me that I could take five smaller 1:1 120VAC transformers (like this), series all the primary windings and all the secondary windings, and get the…
Stephen Collings
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