Question

The combination of two or more cells is called a ___________ (battery, ammeter).

Answer 1

Hint: Cells are used to produce current by performing some chemical reaction. So, cells are the electrical energy source. Battery is also a source of electrical energy. Whereas the ammeter is used to measure the amount of the current flowing in the circuit.

Complete step by step answer:
Since both cell and the battery are the source of the electric current then the question arises which one is bigger. The capacity of the battery is much more than the cells because the battery is a combination of two or more cells. As the number of the cells increases, the capacity of the battery also increases accordingly.
But the ammeter is a device which is used in the circuit to measure the current in a particular circuit. This will work when there will be the source of the electrical current connected to the circuit. Hence the reading of the ammeter is dependent on the source of the electrical current that is the battery or the cell but it is not the combination of the cells.
Hence the correct word to fill the blank is battery.

So, the combination of two or more cells is called a battery.

Note: Some of the difference in the battery and the cell are-
1. Cell is a single unit of source of energy while the battery is the combination of the cells.
2. Cell is normally light and compact while the battery is comparatively heavy and larger in size.
3. Depending upon the type of the electrolyte used in the cells, cells are either dry or wet, cells also include molten salt type whereas batteries are either primary or secondary.
4. Cells are used if the energy is required for a shorter period of time while the battery can be used for a large period of time.