Question

Suppose the ammeter you are using in this experiment do not have positive and negative terminal markings. How will you use such ammeter in the circuit

Answer 1

Magnitude of the current flowing is same. ‘-’ sign indicates the direction of flow of current in the ammeter. Usually ammeters are designed with the standard referrence that current flows from + to - . If you connect it in reverse manner, it displays negative sign to indicate that you have connected opposite polarity.That's it

Answer 2

Here is your answer....

We will use typical battery to determine this.

Connect them with wire and the battery, if their reading are positive then we have connected them correctly and if their reading in negative then we have connect them in opposite polarity.