Asked by: Zada Tanghescience physics
Why does internal resistance in a battery increase?
Last Updated: 20th January, 2020
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Also, what causes internal resistance in a battery?
Sulfation and grid corrosion are the main contributors to the rise of the internal resistance with lead acid. Temperature also affects the resistance; heat lowers it and cold raises it. Heating the battery will momentarily lower the internal resistance to provide extra runtime.
One may also ask, does the internal resistance of a battery change? The resistance of lead acid goes up with discharge. The resistance change between full charge and discharge is about 40%. Cold temperature increases the internal resistance on all batteries and adds about 50% between +30°C and -18°C to lead acid batteries.
In respect to this, what happens when internal resistance increases?
As the resistance of the variable resistor was increased, the current through the circuit decreased. (As using E=I(R+r), for emf E to remain constant, if R increases, current I must decrease). Therefore voltage across the terminals increased (as less is wasted across the internal resistor).
Is there a possibility of increase in internal resistance of a cell Why?
The chemical reaction that takes place inside a battery is the main thing of increasing internal resistance of the battery by increasing of time. Due to that the internal voltage drop also increases which leads to decrease of the terminal voltage of the battery…