Shushant was doing an experiment by using an ammeter. Unfortunately, it fell from his hand and broke. Fearing the scolding of teacher, his group mates advised him not to tell the teacher, but he told her. On listening to him patiently, the teacher did not scold him as it was just and accident and used the opportunity to show the whole class the internal structure of ammeter.
What is the use of ammeter? How is it connected in the circuit?
An ammeter is used to measure
the electric current in the unit of Ampere (A).It can also be used to verify the Ohm’s law.
It is always connected in the series. The figure below shows the ammeter and its connection in the circuit.
Ammeter
Ammeter connected in series.
The ammeter is connected in the series because it has very low resistance If it is connected in parallel across any load then all current in circuit will choose lower resistive path (i.e. ammeter) which will cause the circuit to be damaged. Hence it is used in series. Also the current in the series is always same.