1 00:00:00,910 --> 00:00:02,330 Hello again. 2 00:00:02,440 --> 00:00:06,220 Today we will talk about the components of electricity. 3 00:00:06,220 --> 00:00:14,110 We will talk about voltage current resistance types of currents AC and DC and different type circuits 4 00:00:14,250 --> 00:00:17,560 close or been uncharged. 5 00:00:17,980 --> 00:00:26,950 Let's start by talking about voltage current and resistance as you can see in this image we can use 6 00:00:26,950 --> 00:00:32,700 water to visualize how electricity works. 7 00:00:32,740 --> 00:00:39,360 As you can see here water flowing through our house is a good way to look at electricity. 8 00:00:39,360 --> 00:00:44,420 Water is like electrons in our wire flowing electrons is called current. 9 00:00:45,100 --> 00:00:55,120 So this water that comes out of this pipe is you must imagine it as electronic or electrons Brasher 10 00:00:55,210 --> 00:00:59,290 is the force pushing water through a house. 11 00:00:59,290 --> 00:01:03,700 Voltage is the force bushing electrons for the wire. 12 00:01:04,180 --> 00:01:14,650 So we have electrons for water voltage for brush up or water Russia friction against the whole walls 13 00:01:14,770 --> 00:01:16,290 slows the flow of water. 14 00:01:16,750 --> 00:01:21,990 So resistance is the force that slows the flow of electrons. 15 00:01:22,120 --> 00:01:31,930 So when the resistance increase it will decrease the whole amount of water coming out of the pipe 16 00:01:34,680 --> 00:01:40,440 if we increase the pressure forcing the water through the House by opening up the spigot. 17 00:01:40,710 --> 00:01:44,250 The water flows faster and squares further. 18 00:01:44,250 --> 00:01:52,490 The opposite happens when we reduce the brush of the water flows slowly out down to a trickle in electricity 19 00:01:52,490 --> 00:01:58,110 a force pushing electrons through the wire current is voltage. 20 00:01:58,290 --> 00:02:01,660 If the voltage is increased more current flow. 21 00:02:02,190 --> 00:02:05,210 If the voltage is decreased less current flow. 22 00:02:05,220 --> 00:02:08,800 Now imagine keeping the pressure constant under your eyes. 23 00:02:08,850 --> 00:02:16,570 What happens when we change the amount of water available to flow through the hose. 24 00:02:16,770 --> 00:02:21,130 If there is lots of water the water will flow out at full force. 25 00:02:21,150 --> 00:02:28,110 If there is limited water no matter how hard you Bush the water will only flow out at small trickle 26 00:02:29,070 --> 00:02:37,410 in electricity if there is ample current available it will flow through the wire at full capacity. 27 00:02:37,410 --> 00:02:44,340 If you limit somehow the amount of current then the current will only flow at a reduced rate. 28 00:02:44,340 --> 00:02:51,840 Finally imagine what happened if you kept the pressure and the amount of water available constant but 29 00:02:51,840 --> 00:02:57,300 restricted the diameter of the hose like putting your finger over the end. 30 00:02:57,540 --> 00:03:05,430 The restriction prevents the all water from coming out but the water that does come out comes out with 31 00:03:05,430 --> 00:03:09,010 greater force it will squirt further. 32 00:03:09,090 --> 00:03:16,590 Also the water behind that is the restriction actually slows way down to where it is then to go out 33 00:03:16,980 --> 00:03:18,960 of the restricted hole. 34 00:03:19,110 --> 00:03:26,580 That same thing would happen if the interior wall of the house was made very very rough. 35 00:03:26,580 --> 00:03:32,230 The water molecules would run into the rough surface and slowed down. 36 00:03:32,250 --> 00:03:38,970 There is very much like friction in electricity the current does not flow through our wire without running 37 00:03:39,000 --> 00:03:41,100 into something along the way. 38 00:03:41,670 --> 00:03:49,420 This is always some or there is always some friction but electricity that friction is called the resistance. 39 00:03:49,560 --> 00:03:55,890 One of the Stones goes up the amount of current flow goes down or resistance goes down. 40 00:03:56,370 --> 00:03:59,310 The amount of current flow goes up. 41 00:03:59,310 --> 00:04:10,890 Now you can examine that yourself with water by and test different concepts but this is uh I think that 42 00:04:10,890 --> 00:04:17,760 we should mention at the beginning of our course so that you know what our electrons what the voltage 43 00:04:17,760 --> 00:04:23,820 what is resistance and we try to make a real life example using water 44 00:04:26,760 --> 00:04:30,020 now let's look at this image here. 45 00:04:30,150 --> 00:04:37,700 To summarize what we have learned as you can see in a we have low brush out so small amount of water. 46 00:04:38,460 --> 00:04:46,020 Low brush up and small amount of water is coming in a while and b there is high brush a large amount 47 00:04:46,020 --> 00:04:51,930 of water as you can see the water will go further since the brush out here is high. 48 00:04:52,110 --> 00:04:58,200 While in case for large diameter pipe as you can see at this diameter is much larger than this then 49 00:04:58,290 --> 00:05:00,900 large amount of water will come out. 50 00:05:00,900 --> 00:05:04,160 Uh we here the brush out is kind of stunned. 51 00:05:04,260 --> 00:05:09,950 But the amount of water that came out of here is our much more. 52 00:05:10,170 --> 00:05:16,810 This means that this pipe has low resistance and electricity terms. 53 00:05:17,820 --> 00:05:23,160 And this one has these two has higher resistance since they have a small diameter. 54 00:05:23,400 --> 00:05:27,950 This one have uh high resistance. 55 00:05:28,020 --> 00:05:31,800 This is the by example for voltage current and resistance. 56 00:05:31,800 --> 00:05:39,030 I hope that you have got the idea if you have any questions please ask in the Q and A dashboard. 57 00:05:39,030 --> 00:05:39,930 Thanks for watching.