1
Question
An electric bulb rated 220 V, 60 W is working at full efficiency.
Another identical bulb is connected in series with the first one and the system is connected across the mains as shown in the diagram:
The total power of the bulbs is:
An electric bulb rated 220 V, 60 W is working at full efficiency.
Another identical bulb is connected in series with the first one and the system is connected across the mains as shown in the diagram:
The total power of the bulbs is:
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Solution
The correct option is B 30 W
30 W
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