Capacitor calculations - Basic calculations for capacitors in series and parallel
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Date: 2023-11-17
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Comments and reviews: 28
Jeff
Great video! But I always have trouble when teachers say one thing in an example, then contradicts in the next
statement. At 13: 07 it is stated that the capacitor will never reach 9volts but only 8. 94volts. very close to 9volts.
Then at 15: 07 it is stated that the capacitor charge is 9volts. NOT 8. 94. It is helpful to state ideally we can say
the battery is at 9volts for purpose. When I try to be precise on test, I would use 8. 94volt when calculating say
a current with 500ohm resistor and put 17. 88mA. it would be marked incorrect! Yet in other calculations we're
suppose to be precise! Very confusing! If teacher want students to use the complete 9volts, it should be stated
given capacitor has a 9volt change! I'm always to the left or to the right! But at least I'm not alone. lol!
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Great video! But I always have trouble when teachers say one thing in an example, then contradicts in the next
statement. At 13: 07 it is stated that the capacitor will never reach 9volts but only 8. 94volts. very close to 9volts.
Then at 15: 07 it is stated that the capacitor charge is 9volts. NOT 8. 94. It is helpful to state ideally we can say
the battery is at 9volts for purpose. When I try to be precise on test, I would use 8. 94volt when calculating say
a current with 500ohm resistor and put 17. 88mA. it would be marked incorrect! Yet in other calculations we're
suppose to be precise! Very confusing! If teacher want students to use the complete 9volts, it should be stated
given capacitor has a 9volt change! I'm always to the left or to the right! But at least I'm not alone. lol!
reply
Elvin
hello sir how are ignition coils effected by that capacitors how culd I posibly retard me ignition coil.
Also when I do use capacitors me alternator back feads more until I reach higher rpm ranges expeciali if I use hv ceramic capacitors so I was wondering how to control the linear voltage regulator properly to fix that problem basicali I was wondering if negative voltage regulator with voltage devider wuld help me or not?
Basicaly I try some how to use automotive relay to power my e core ignition coil but I am not shure If I can build dimmer for that thing to delay ignition coils magnetic field it does use ignition module after all so I was wondering how those calculations apply to transformers and inductors and how to predict out comme?
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hello sir how are ignition coils effected by that capacitors how culd I posibly retard me ignition coil.
Also when I do use capacitors me alternator back feads more until I reach higher rpm ranges expeciali if I use hv ceramic capacitors so I was wondering how to control the linear voltage regulator properly to fix that problem basicali I was wondering if negative voltage regulator with voltage devider wuld help me or not?
Basicaly I try some how to use automotive relay to power my e core ignition coil but I am not shure If I can build dimmer for that thing to delay ignition coils magnetic field it does use ignition module after all so I was wondering how those calculations apply to transformers and inductors and how to predict out comme?
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modelsfirst
Would a 100volt 3, 700 or 5, 000 or 10, 000 Farrad capacitor be dangerous? I need 100volt because a bicycle bottle or hub dynamo can output up to around 100 volts ac on very fast down hill descents. I plan to use it to make a full wave bridge rectifier as a smoother for my vintage bicycle dynamo lights to stop the very annoying strobing that occurs with the AC & to hopefully enable the light to glow for a few minutes when stopped at traffic lights when the current from the dynamo is no longer flowing - the capacitor discharging into the load ( a 3 watt total of front & rear led bulbs. How long could I expect the lights to glow for before going out completely with these value capacitors please?
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Would a 100volt 3, 700 or 5, 000 or 10, 000 Farrad capacitor be dangerous? I need 100volt because a bicycle bottle or hub dynamo can output up to around 100 volts ac on very fast down hill descents. I plan to use it to make a full wave bridge rectifier as a smoother for my vintage bicycle dynamo lights to stop the very annoying strobing that occurs with the AC & to hopefully enable the light to glow for a few minutes when stopped at traffic lights when the current from the dynamo is no longer flowing - the capacitor discharging into the load ( a 3 watt total of front & rear led bulbs. How long could I expect the lights to glow for before going out completely with these value capacitors please?
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Daniel
Ok i do not understand the series visualization you provided. How does the capacitor energize without a circuit being completed? And then how will the parallel get energized if the electrical current takes the path of least resistance and flow through the light and back to the battery? I would think the path to the capacitor would be more resistance due to power not flowing through the capacitor and shouldnt flow at all. Now im definitely not an electrician and electricity as a whole has always been a weakness and i struggle to grasp certain concepts with this being one of them. Any explanation to help me understand would be greatly appreciated.
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Ok i do not understand the series visualization you provided. How does the capacitor energize without a circuit being completed? And then how will the parallel get energized if the electrical current takes the path of least resistance and flow through the light and back to the battery? I would think the path to the capacitor would be more resistance due to power not flowing through the capacitor and shouldnt flow at all. Now im definitely not an electrician and electricity as a whole has always been a weakness and i struggle to grasp certain concepts with this being one of them. Any explanation to help me understand would be greatly appreciated.
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claude77573
Nice video, but I am confused about something. At 3: 00 into the video, there is a formula (with some symbol changes) that says W(joules) =. 5 x Farads x Voltage2. A Farad is defined as Capacitance(Farads) = Q(Columbs) / V(Volts. This can also be written as Q(Columbs) = Capacitance(Farads)V(Volts. Energy, or Work, is defined as W(joules) = Q (Columbs) V(Volts. So the work/energy of a capacitor is W(joules) = Capacitance(Farads)V(Volts)2. Where does the. 5 factor come from?
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Nice video, but I am confused about something. At 3: 00 into the video, there is a formula (with some symbol changes) that says W(joules) =. 5 x Farads x Voltage2. A Farad is defined as Capacitance(Farads) = Q(Columbs) / V(Volts. This can also be written as Q(Columbs) = Capacitance(Farads)V(Volts. Energy, or Work, is defined as W(joules) = Q (Columbs) V(Volts. So the work/energy of a capacitor is W(joules) = Capacitance(Farads)V(Volts)2. Where does the. 5 factor come from?
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Shadegest
I'm an ETO on ship and have one qustion which I can't fully understand. On ships we almost don't use any capacitors, but there is one way to trick the erath fault system with the capacitor. For example, If there is an earth fault on gauge, u can use capacitor in series with curcuit and the earth fault will be again normal, and even pointer will movie if we will press the button for checking the earth fault. Anybody's guess how this work?
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I'm an ETO on ship and have one qustion which I can't fully understand. On ships we almost don't use any capacitors, but there is one way to trick the erath fault system with the capacitor. For example, If there is an earth fault on gauge, u can use capacitor in series with curcuit and the earth fault will be again normal, and even pointer will movie if we will press the button for checking the earth fault. Anybody's guess how this work?
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Hafizur
Brilliant everything crystal clear to understand. Please make one video on motor coil how all the coil wires are twisted together. Every video shows but not clear at all how the set coil winding is twisted together before they are attached to the connector contactor and switches. Sorry for the trouble.
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Brilliant everything crystal clear to understand. Please make one video on motor coil how all the coil wires are twisted together. Every video shows but not clear at all how the set coil winding is twisted together before they are attached to the connector contactor and switches. Sorry for the trouble.
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talon04091
I know this is pretty old but hopefully someone will answer. When doing the time constant you stopped at 5 and said it would never fully charge but if you took it to 6 does that mean an led would blink right before discharge since it's fully charged at 6 time constants?
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I know this is pretty old but hopefully someone will answer. When doing the time constant you stopped at 5 and said it would never fully charge but if you took it to 6 does that mean an led would blink right before discharge since it's fully charged at 6 time constants?
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Loz
Thanks for this. It's the first video I've found that actually explains how capacitors work in a circuit and how to calculate the desired capacity as well as info about configuration, which a newbie would certainly find useful. Good job!
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Thanks for this. It's the first video I've found that actually explains how capacitors work in a circuit and how to calculate the desired capacity as well as info about configuration, which a newbie would certainly find useful. Good job!
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Ben
Hi experts, may I know how to read the capacitor. Let say the label on the capacitor is 250uf and 25v. Does it mean it can store up to 250uf when 25v is applied? What if I apply a lesser voltage let's say 2 volt?
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Hi experts, may I know how to read the capacitor. Let say the label on the capacitor is 250uf and 25v. Does it mean it can store up to 250uf when 25v is applied? What if I apply a lesser voltage let's say 2 volt?
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Paul
Another superb video, thanks for posting.
Just one tiny criticism; for the sake of brevity it may be better to round the figures in your worked examples to just two significant places.
Regards Paul
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Another superb video, thanks for posting.
Just one tiny criticism; for the sake of brevity it may be better to round the figures in your worked examples to just two significant places.
Regards Paul
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Chris
Working out charge across each capacitor, voltage across each capacitor and energy stored in each capacitor in a combination circuit is genuinely one of the hardest things I've done in my life I swear
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Working out charge across each capacitor, voltage across each capacitor and energy stored in each capacitor in a combination circuit is genuinely one of the hardest things I've done in my life I swear
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Ben
Dear Experts, at 9: 34, the capacitor is storing charge at the positive side which is different from the beginning. So for AC which is alternating, will it damage electrolytic capacitor with polarity?
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Dear Experts, at 9: 34, the capacitor is storing charge at the positive side which is different from the beginning. So for AC which is alternating, will it damage electrolytic capacitor with polarity?
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Brian
Thank you so much. This is really fascinating! I have an electronics lab in my apartment. I plan on going back to school online this December. Very few schools teach regular electronics anymore.
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Thank you so much. This is really fascinating! I have an electronics lab in my apartment. I plan on going back to school online this December. Very few schools teach regular electronics anymore.
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Mach1
8: 10 I had to write the formula like this (1/(1/10)+(1/220)= then paste it in MS Calculator. W/O the extra parentheses the value was at 0. 10455 where the 1/ didn't calculated in the function.
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8: 10 I had to write the formula like this (1/(1/10)+(1/220)= then paste it in MS Calculator. W/O the extra parentheses the value was at 0. 10455 where the 1/ didn't calculated in the function.
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Muhammad
I have a question,
if the capacitor is 12 volts, what does it mean? it needs 12 volts to operate fully or it can handle 12 volts,
will it give 12 volts upon fully charged?
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I have a question,
if the capacitor is 12 volts, what does it mean? it needs 12 volts to operate fully or it can handle 12 volts,
will it give 12 volts upon fully charged?
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ROCKY
Anyone tell me
If a capacitor is charged by a battery of some volt
Then it is removed from battery and connected to another uncharged capacitor
Now what actually happens?
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Anyone tell me
If a capacitor is charged by a battery of some volt
Then it is removed from battery and connected to another uncharged capacitor
Now what actually happens?
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michael
Common men when you convert microfarad to farad you are moving the point seven places to the left instead of six since 1 farad equals 1, 000, 000 microfarad
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Common men when you convert microfarad to farad you are moving the point seven places to the left instead of six since 1 farad equals 1, 000, 000 microfarad
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dickchese
U say capacitors do not store outgoing energy why in 2: 09 the out going energy from the led goes into the capacitor insted of the battery
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U say capacitors do not store outgoing energy why in 2: 09 the out going energy from the led goes into the capacitor insted of the battery
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Koko
It's superbly explained and you have take so much effort to do a great tutorial. I salute you. I've made a small donation for your Coffee!
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It's superbly explained and you have take so much effort to do a great tutorial. I salute you. I've made a small donation for your Coffee!
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education
how do i calculate: the size of a capacitor that causes a current of 2A to flow when it is connected across a 480V 50Hz supply.
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how do i calculate: the size of a capacitor that causes a current of 2A to flow when it is connected across a 480V 50Hz supply.
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education
how do i calculate: the size of a capacitor that causes a current of 2A to flow when it is connected across a 480V 50Hz supply.
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how do i calculate: the size of a capacitor that causes a current of 2A to flow when it is connected across a 480V 50Hz supply.
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Brings
You made me understand what a capacitor does in less than a sentence(and visual aid) i didnt understand it until now, thank you!
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You made me understand what a capacitor does in less than a sentence(and visual aid) i didnt understand it until now, thank you!
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gigih
Saya sangat suka penjelasan anda. Orang yang tidak mengerti bahasa Inggris pun bisa memahaminya.
Terima kasih telah berbagi.
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Saya sangat suka penjelasan anda. Orang yang tidak mengerti bahasa Inggris pun bisa memahaminya.
Terima kasih telah berbagi.
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Khizer
sir if we don't know the value of charge(coulombs) and capacity (farad)how we find the capacitor value sir kindly tell me
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sir if we don't know the value of charge(coulombs) and capacity (farad)how we find the capacitor value sir kindly tell me
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Serkan
In series capacitors, the total capacitence never exceeds the first capacitor which is 10 and that makes perfect sense.
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In series capacitors, the total capacitence never exceeds the first capacitor which is 10 and that makes perfect sense.
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Trevor
Can you add higher capacitance or voltage say 3300uf 25v can you put 4000uf at 25v or can you put 3300uf and 60v
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Can you add higher capacitance or voltage say 3300uf 25v can you put 4000uf at 25v or can you put 3300uf and 60v
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education
would a bunch of smaller caps smooth better than a single bigger cap at the same rating or same function?
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would a bunch of smaller caps smooth better than a single bigger cap at the same rating or same function?
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