Why can't the multimeter carry the 9.3V battery that was measured in the multimeter's 9V battery?
This needs to be described from two angles. owing to the distinction between alkaline and carbon batteries in 9V stacked batteries!
1. The carbon battery can produce a lot of current in an instant, but not for very long! The argument is weak! It will essentially use a lot of power if you don't use it for a month or two. Replace the spare battery when the power is low and you run out of juice only to discover that it is no longer functional. There is no word, and the multimeter only shows the specific performance. To display it, turn it on and off again. Remove the measuring voltage, and you will find 8V of voltage.
2. Alkaline batteries are ideal for multimeters because of their consistent output and long lifespan. I used to use carbon batteries, and I still need to replace a few of them every year. There has never been a failure like yours since I changed the alkaline battery of a well-known domestic manufacturer. If you give it some thought, a significant inaccuracy would occur from the multimeter's lack of power while trying to detect the voltage resistance. How deceitful? Alkaline batteries have a low discharge capacity, which makes it possible to store them for a very long time. You can rely on a 10-year guarantee.
The current, not the voltage, is what determines if a battery is functional. The battery can be utilized regardless of voltage as long as it can supply a specific current.
Voltage is merely a difference in potential. It simply indicates that there can be a distinction between these two locations. There need not be a current in order for there to be a potential difference. When a battery is empty, for instance, there is undoubtedly a potential difference between the two electrodes, but no current flows because no conductor has been produced. circuit.
What if a loop exists? One of the most extreme scenarios is joining the electrodes' ends directly with a wire (such as copper wire). According to legend, there ought to be a strong current at this moment. After all, the conductor (copper wire) has a very low resistance. Ohm's law states that the current is undoubtedly not small, but the reality is different. This is so because the battery itself acts as a power source by creating resistance. Internal resistance is extremely high (compared to the wire), and it also has an impact on how much current the battery can supply. restrict.
The internal resistance of the battery will grow when it is used or left for a while, which will ultimately prevent it from drawing much electricity. Despite the fact that the voltage may currently be monitored with no load, when you connect it The internal resistance of the battery causes the voltage to drop quickly when a load takes current, which eventually prevents the battery from supplying power normally.
Some people used to pump salt water into the battery to lower the internal resistance, which would alleviate the problem and restore the battery's ability to deliver power for a while. Nothing is still functional.
