Question

Name the instrument used to measure the electric current in a circuit. How is it connected in the circuit?

Answer 1

Hint: Here, we will proceed by defining the term electric current. Then, we will write down the device used to measure electric current along its various aspects of this device. We will also elaborate how it is connected in a circuit.

Complete step by step answer:
Electric current is defined as the rate of flow of negative charges of the conductor. In other words, the continuous flow of electrons in an electric circuit is called an electric current. The conducting material consists of a large number of free electrons which move from one atom to the other at random.
An ammeter measures the electric current in a circuit. The name is derived from the name for the SI unit for electric current, amperes (A).
The ideal ammeter has zero internal resistance. But practically the ammeter has small internal resistance. The measuring range of the ammeter depends on the value of resistance.
The ammeter is connected in series with the circuit so that the whole electrons of measured current passes through the ammeter. The power loss occurs in ammeter because of the measured current and their internal resistance. The ammeter circuit has low resistance so that the small voltage drop occurs in the circuit.
The resistance of the ammeter is kept low because of the two reasons which are that the whole measured current passes through the ammeter and the low voltage drop occurs across the ammeter.
In order for an ammeter to measure a device’s current, it must be connected in series to that device. This is necessary because objects in series experience the same current. They must not be connected to a voltage source. Ammeters are designed to work under a minimal burden (which refers to the voltage drop across the ammeter, typically a small fraction of a volt).

Note:
Ammeters are used to measure the current flow in the buildings to ensure that the flow is not too low or too high. They are also used in manufacturing and instrumentation companies to check the functionality of the devices. It is also used with a thermocouple to check the temperature.