Ground is a reference voltage that may or may not be connected to the earth. Here is the link to the video on measuring voltage: • Understanding Voltage
Sir I can't believe your videos were all deleted! Huge loss of such valuable precious information on almost all electronic topics ugh!. I felt so lucky to have viewed them all and even downloaded one or two. Information is really precious folks.
12:01 If a person gets an accidental contact to hot or live wire one's heart would enter Ventricular Fibrillations VFib if an AC current of about 6 mA is established across the heart; remember that condition is met if AC current of 50 mA to 100 mA goes through the ones body as a whole. O.K. Now I get why an RCD with 30 mA leakage current rating would help in preventing those life endangering hazardous leakage of currents though human or animal entities! Thank you so much for very good velog for human safety in domestic electrical systems.
I love this video. It does have an apparent contradiction (if my newbie understanding is correct) 8:50-11:06, but this is one of the many reasons I like it. The whole video provides so many insights and clarifications that I personally needed. I suggest readers resolve the following. If current from the side is 0.1 A and current through R2 is 1.1 A then current through R1 is 1 A. The voltage across R1 is therefore 10 volts, but this contradicts the 9 volt conclusion. Revisit the assumption the current from the side is 0.1 amps and assume the voltage source from the side is 11 volts instead. It occurs to me there is no contradiction in what vocademy says, but a miscomprehension on my part. Whereas initially - I thought vocademy said 0.1 amps from the side, he would have said 0.1 more amps through R2 than before; - I thought vocademy said 0.1 + 1.0 amps through R2 and 1.0 amp through R1, he would be saying 0.2 + 0.9 amps through R2 and 0.9 amps through R1. Multiplying out R1 we get 0.9 × 10 = 9 volts; exactly as vocademy says!
A question please. What is the point of making AC neutral (or the negative DC potential in your example here) the same potential as earth. If neutral was not the same potential as earth and you accidentally touch the hot wire then electricity couldn't flow through you to earth - similarly as it wouldn't with an isolation transformer. The hot wire would thus not cause harm. Thank you for your excellent videos by the way.
Great instruction, excellent simple teaching aids. Well done!!
Sir I can't believe your videos were all deleted! Huge loss of such valuable precious information on almost all electronic topics ugh!. I felt so lucky to have viewed them all and even downloaded one or two. Information is really precious folks.
Thank sir your video explain well difference between ground and earth
12:01
If a person gets an accidental contact to hot or live wire one's heart would enter Ventricular Fibrillations VFib if an AC current of about 6 mA is established across the heart; remember that condition is met if AC current of 50 mA to 100 mA goes through the ones body as a whole.
O.K. Now I get why an RCD with 30 mA leakage current rating would help in preventing those life endangering hazardous leakage of currents though human or animal entities!
Thank you so much for very good velog for human safety in domestic electrical systems.
hello just subbed...you are a good teacher. Am a student in EEE year 2 but I came across this and though about watching it for my career's sake
sir I wish I had you for my teacher when I was at school sir
Great explanation on grounds and demystifying the path of least resistance.
I love this video. It does have an apparent contradiction (if my newbie understanding is correct) 8:50-11:06, but this is one of the many reasons I like it. The whole video provides so many insights and clarifications that I personally needed.
I suggest readers resolve the following. If current from the side is 0.1 A and current through R2 is 1.1 A then current through R1 is 1 A. The voltage across R1 is therefore 10 volts, but this contradicts the 9 volt conclusion.
Revisit the assumption the current from the side is 0.1 amps and assume the voltage source from the side is 11 volts instead.
It occurs to me there is no contradiction in what vocademy says, but a miscomprehension on my part.
Whereas initially
- I thought vocademy said 0.1 amps from the side, he would have said 0.1 more amps through R2 than before;
- I thought vocademy said 0.1 + 1.0 amps through R2 and 1.0 amp through R1, he would be saying 0.2 + 0.9 amps through R2 and 0.9 amps through R1.
Multiplying out R1 we get 0.9 × 10 = 9 volts; exactly as vocademy says!
A question please. What is the point of making AC neutral (or the negative DC potential in your example here) the same potential as earth. If neutral was not the same potential as earth and you accidentally touch the hot wire then electricity couldn't flow through you to earth - similarly as it wouldn't with an isolation transformer. The hot wire would thus not cause harm. Thank you for your excellent videos by the way.
Sir can you please upload what is capacitance video please
Great
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