When two bulbs A and B are connected in series and a third bulb is added to the circuit, what will happen to the brightness of all bulbs if the third bulb is connected in series with bulbs A and B?
Answer: Decrease
Explanation
If the third bulb is connected in series with bulbs A and B, the total resistance in the circuit will increase. As a result, the current flowing through the circuit will decrease, leading to a decrease in the brightness of all bulbs.
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