3. A light bulb glows because of it's resistance, and the brightness of the bulb increases with the electrical power delivered to it from the circuit. In the circuit below, the two bulbs are identical. Compared to bulb A, does bulb B glow more brightly, less brightly or equally bright (when the bulbs are both in the circuit on the left)? Bulb B is removed from the circuit s shown on the right. Compared to the brightness of bulb A on the left, does bulb A on the right glow brighter, dimmer, or equally bright? Explain.
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- In the left circuit (a), bulbs A and B are connected in series. - In the right circuit (b), only bulb A is present in the circuit. Show more…
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