Why battery terminal voltage is less during discharging of battery?

  • The terminal voltage is less than the EMF of a cell or a train of cells. The cell voltage is the voltage available at the terminals of the battery. This is equal to EMF - Voltage drop(s)due to internal resistance in Ohm(s) times the current( in amps) drawn. When battery is fully charged, internal resistance decreases to minimum. Therefore when battery is down, the terminal voltage doesn't fall to zero, but it remains near about the battery voltage. When load is drawn, all the voltage drops within the battery due to high internal resistance developed when battery is down.

Read More:https://sdvelectrical.blogspot.com/2020/08/why-is-battery-terminal-...

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