 Alright, so we will continue from where we left off. So what we are doing before? We are trying to find out on what factors resistance are sure. If you increase it, the resistance should also increase. Okay, now the thing is that the resistance, they change very little. Okay, so if you, a degree Celsius and 6, 8 and 3 are observed. Okay, minus 4 per degree Celsius. The scenario, what is the temperature of nichrome value? Alpha delta T, 0.3, 1 plus T minus T is the temperature. Yeah, because of this delta T. It's not in itself. No, you are doing calculation. Yeah. So T will be approximately, actually sorry, T minus 27. So T will be 842 degrees Celsius around this. 8 and 4. Okay. Yeah, I got it. So this is how you can, should not be. You are welcoming another question. I am giving you the one. Resistance at steam point is 5.23 ohms. What is the ice point? Zero degrees Celsius. Steel point is 100 degrees Celsius. Okay. So when the temperature is found to be 5.795 ohms. This is unknown temperature. Find out this unknown temperature. See, resistance at unknown temperature is 5.795. How much is that unknown temperature? You don't need alpha. Yeah. Don't use calculator. What? 70 degrees. It's not blind. You can, after getting answer also, you can see whether it makes sense or not. 345? Yeah, 345. Around 345. Around 345. Yeah. Yes, correct. See formula remains this only. Yeah. R naught 1 plus alpha delta T. What is delta T? Temperature final situation. That is final. So R is what? 5.23. It has become this much from 5. This is going to 1 plus alpha into 100. So I can say 5.795 is going to 5 into 1 plus alpha into T. Okay. And then you can find the value of T. Alpha as 0.795 divided by 5T. This I will substitute here. I'll get the value of T. Okay. See you could have u into 1 plus will be similar only. May not be same. Okay. Yeah, 0.4 here. Fine. So resistance. Fine. First we did length and area also. Fine. And then we found out not just that things get affected by the temperature also. Resistance or resistivity is over now. Resistance. What happens is it does circuit. Okay. It will not be directly written on the resistance that it is 315 ohms. Okay. Because at times resistance are very, very small. Have you seen this? Violet. Right. So they have some lines. So there is a code. So let us understand that exactly identify what is the value of resistance. Fine. So write down. You should have 4 columns. Okay. Note book. Broke 4 columns. Right now this is black, brown, gold, silver, no color. Done. How come? Like I am done. You should be also done. Covering the board. Oh, I was covering the board. Now the way to remember this. See you should remember this in sequence first. Now the way to remember. Okay. So this is BB456. So 0 to 9 number in tail white. This is multiplier. Write down. Multiplier for 0 is 10 is for 0. This is 10 is for 2. 10 is for 3. This is 4, 5, 6 and silver also. This is 10 is for minus 1. This is 10 is for minus 2. See how logical it flows. First of all this logic. Then you have 0 to 9 and then multiply. Okay. Now, so the gold is associated with 5% error. This is now when you see a resistance in the lab which has 4 columns. Yes. It is like a cylindrical thing. Right. From here one wire comes out and one wire from there. So it will have 4 bands of color. 4 bands of colors will be there. The first 2 bands. First 2 bands are first 2 digits of the resistance. First 2 bands are first 2 digits of the color. The third band is a multiplier. It's a multiplier. So next of the colors you should pick from here. Are you asking something? Yes. Oh, you will see the top. Yeah. So the gold, silver and no color. Yeah. Okay. Now what if there is no color? Then there will be space left out like this. So these 3 colors will be closer to this side. So there is a 4. Find out what is the resistance of this. This is suppose yellow. Don't talk. This is brown. This is green or silver. Tell me what is the resistance of this. 41 is the damage to first 5. So minus 41 is the damage to first 5. So yellow is 1. So 41. First 2 digits. And then you have plus minus silver. Which is the tight pass.