measurement of emf of commercial cells by using voltmeter #12thchemistry #hsc @a2zpractical991

Hello friends, my name is Sachin Shukla and you are watching A2J practicals So, friends, today's experiment is activity number 4. So, friends, in activity number 4, we are going to measure the EMF of the commercial cell. i.e., the cell used in our homes, we are going to measure its EMF Basically, we are going to measure its voltage. So, friends, for that, I will use this voltmeter; it is a digital voltmeter. Basically, we measure many things with this; this is an ammeter, and we can measure a lot of things with it. But basically, what I'm going to do with this is measure the voltage of our entire battery. which will be carried out in the experiment So I will do it and show you. So you basically see it very well; it is very interesting. So let's get started. So, friends, I have this voltmeter, and how do you have to set it? There are two terminals here. One is COM, and this is the voltmeter. So you have to set it at 20, at 20 volts Basically, you can see it here, you can see 2 to 20, you need to set it And you can use all the commercial rooms of your house As you can see in Activity No. 4 The first one you are seeing in front of me, the book is open, the first one is the TV remote cell. That's how much voltage you have, clear So I take a TV remote battery here, I have a lot of batteries. See this, you have a lot of cells So I will measure all of them and show you. So you have to put it in a COM, you have to put it in a voltmeter. These two terminals are ready here. Now, what you basically have to do here is measure it. Like if I measure this TV remote cell here So we will know how many volts are displayed here So I'm touching it here And you're seeing how much it's displaying, 1.6 One you have to touch the positive terminal and one you have to touch the negative terminal How much is it displaying? 1.6 So you must be seeing 1.6 By the way, I have a lot of batteries here. This wristwatch also has a thin battery. You can also check it. How much is it showing? 3.3 3.3 is showing Likewise, I have heavier batteries as well. As you can see, this You can also see this I have a very heavy battery. So I'll check it as well and show you the amount. ․ And touch it here 1.6 is coming How much is it showing? 1.6 So I tell you all the answers here You will see this book open in front of me. You can see the TV remote control cell at the first point. The wall clock is visible on the second floor. And on the third, the torch battery cell is visible And on the third, the wristwatch is visible You can see all the answers here If you wish, you can write this answer. And if you want to check So according to this, as I told you, practically You can write it by checking it accordingly So thank you for watching this video And please subscribe to A2J Practical Thank you