Question $28$

What is the potential difference between points A and B$?$

Reminder: All light bulbs, resistors, and batteries should be considered identical unless you are told otherwise. Any battery is assumed to be ideal; that is$,$ the internal resistance of the battery is negligible. In addition, assume the wires have negligible resistance. Ignore any change in resistance in a light bulb filament when it heats up$.$

Answer:

$0$ V

$3$ V

$6$ V

$12$ V