Question

In a cell current flows from positive to negative, then where is the loss of current when it again reach to the cell or battery.

Answer 1

Cell:

1. A cell is a single device that converts chemical energy into electric energy.
2. The chemical reactions in a battery involve the flow of electrons from one material (electrode) to another, through an external circuit.
3. The flow of electrons provides an electric current that can be used to do useful work.

Explanation:

1. This happens mainly due to heat loss when we apply resistance to it.
2. The operation of any battery generates heat due to the $I^{2}R$ losses( $I$=current, $R$= resistance) as current flows through the internal resistance of the battery whether it is being charged or discharged. This is also known as Joule heating.
3. When we apply resistance, some of the electrical energy converts into heat loss.
4. Temperature variation inside the batteries can lead to the uneven temperature distribution which creates uneven charge/discharge behavior within the pack
5. When the electrical path is provided by the electrolyte and an external electrical circuit connects the anode and cathode.
6. The two simultaneous reactions proceed and the electrons freed at the anode travel through the external electrical connection.
7. And react chemically at the cathode to make the cell function.
8. The cell can continue to discharge until either or both of the electrodes run out of reagents for their respective reactions.
9. In a primary cell, this means the end of its useful life.

Hence, loss of current occurs due to a lack of reagents at a specific time.