An idealized ammeter is connected to a battery as shown in Fig. E25.28

. Find (c) the terminal voltage of the battery.

Video transcript

Hi everyone today, we are going to determine the potential difference across the south terminals uh, of this circuit right here. So we have a nearly ideal amateur which is used. And the way we want to solve this is to essentially by uh, using the reasoning of Homes Law. So first, let's start with recalling what the OEMs Law is. So, um, Slaw itself is going to be fee equals I. R. Like. So, so in this case, uh, the eight poems here, Eight Homes is gonna be the internal assistance off the cells. So because it is the internal resistance, then we will know that it will have no effect on the thermal voltage, no effect on terminal voltage. So essentially the meter here is connected across the battery terminals and the battery terminals itself have a short circuit. So assuming that we have ideal conductors, the are in the circuit totally, then is going to equal to zero are in circuit equals to zero. And because the RN Circle is zero using the own slaw v equals i. r. Due to the source wicket, then we will equals two. I multiply by zero. So the V is gonna be zero fault. Essentially, we will not be able to detect a potential drop across the battery terminals due to the sorts short circuit itself. Okay, so since the potential across the amateur or the conducting wires Equals to zero, then the potential drop across the terminal Is also equals to zero Fault. So the answer to this problem is going to be fee equals to zero fall, which is going to be option D. And it will be all for this particular problem. Make sure to check out either problem. Examples similar to this. If you guys are still confused, and that will be all. Thank you.