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Which bulb will glow brighter, 100W or 60W?
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Which bulb will glow brighter, 100W or 60W?
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The resistance of the bulb is given by R=V2/P. So the resistance of 60 W bulb is more than the resistance of 100 W bulb. When they are connected in series the current through both bulbs is same. Hence 60 W bulb will be more brighter because P = I2R.
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