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in a series circuit, as light bulbs are added, the voltage at the battery increases/decreasees/remains the same in a series circuit, as light builbs are added, the current at the battery increases/decreases, remains the same.

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Voltage at battery remains the same, but the current decreases. Addiing lightbulb increases the total resistance of the circuit, hence decreases current.
so in a parallel circuit, voltage would be the same, and current would increase because of decrease in resistance?

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but i thought if a light bulb were removed/added, its brightness wouldn't change
in parallel
You could try if you want :) Which part makes you think like that.
nvm you're right, thanks!

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