Question

Which terminal of an ammeter is connected to positive?

Answer 1

Hint: Firstly, we should know about the meaning of “ammeter”. An ammeter is a tool that can measure either direct current or alternating current. The unit of current is known as an ampere. This apparatus is referred to as an ammeter since it measures current in amperes.

Complete answer:
Principle of Ammeter:
The resistance and inductive reactance must be very low according to the ammeter's basic operating principle. Since there should not be any voltage drop across the ammeter, it has an extremely low impedance. Due to the aforementioned issue, the ammeter cannot be connected in parallel. The current will be the same in a series connection. Additionally, connecting two ammeters in parallel runs the risk of a short circuit and the instrument being damaged by the current flowing through the ammeter. Impedance must be zero for a perfect ammeter in order for there to be no voltage loss across the device.

The two ammeter leads must be connected in the circuit so that current can flow through the ammeter in order to measure current. If your ammeter doesn't have a +ve and -ve marking, you'll need to attempt both methods; in one of them, the ammeter will display a reading that is either negative (below the least count) or very likely zero; in that case, simply invert the terminal and measure the current.

It is necessary to connect the ammeter's positive connection to the battery's positive terminal. Red markings indicate the ammeter's positive terminal.

Note: Because only a tiny fraction of the current is sent via the metre mechanism at high values and the majority is carried by a shunt in parallel with the metre, an ammeter can measure a wide range of current values.