Household electric bulbs of 60W, 100W and 200W are joined in series. Which of them will glow the brightest? Give reason
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Answer: Bulbs connected in series each take the same current. Power is also given by the equation P = I2R. With the same current, the bulb with the bigger resistance will dissipate more power. Since the 60 W bulb has the larger resistance, it will be brighter.
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