Question

What is the primary battery? Give one example.

Answer 1

Hint: Battery: It is defined as a device which consists of one or more electrochemical cells that are capable of converting chemical energy to electrical energy. The energy stored in batteries is measured in watt-hour i.e. product of voltage across the battery and current in the battery. There are three components of batteries. Positive electrode which is known as cathode and negative electrode which is known as anode.

Complete step by step answer:
Let us first talk about batteries and its types.
Cell: It is defined as an energy source which can deliver dc voltage and current but in very small quantities.
Charging current: It is defined as the maximum current which can be applied to charge the battery.
Charging voltage: It is defined as the maximum voltage which can be applied across the battery to charge the battery.
Discharging current: It is defined as the current which is delivered to the load at the time of discharging of the battery.
There are two types of batteries: primary batteries i.e. non-rechargeable and second batteries i.e. rechargeable batteries.
Primary batteries: Those batteries which cannot be rechargeable , are known as primary batteries. For example: dry cells. The cells used in remote are examples of primary cells because they cannot be recharged once they discharge.
Secondary batteries: Those batteries which can be rechargeable, are known as secondary batteries. For example: lead acid. The batteries used in our house are examples of secondary batteries i.e. the batteries which can be recharged.
Dry cell: Dry cell is the example of primary battery. They have finite life time as they cannot be recharged once they get discharged. And the advantage of using a secondary battery over a primary battery is that we can recharge them over a certain time.

Note:
The cells used in watches, clocks, remotes and torches are the examples of primary cells and the batteries used in cars, houses, bikes they all are the examples of secondary batteries as we can recharge them.