Why voltage across resistor equals voltage across battery?

00:00 Forces in & out of battery
01:58 Resistor Vs Wire
03:34 How is the current the same?
05:20 How Force adjusts 'automatically?'
6:40 Answering our question!
15:53 What is the potential difference?
17:33 Summary
18:13 One last doubt +ve & -ve!?

Why is the voltage across the resistor the same as that across the battery? Because the electric force from the battery is localised in the resistor!
This happens because the current everywhere is exactly the same!
So, when electrons gain potential energy inside the battery,
They lose all the potential energy to the resistor as heat.
Then, they don't lose any potential as they come back.
Voltage is the potential energy gained/lost per C.

Hence, the voltage across the resistor = voltage of the cell.



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