a) a flashlamp bulb is marked '2.5V,0.30A' and has to be operated from a dry battery of e.m.f 3.0V for the current p.d. of 2.5V to be produced across it. Why?
b) ow much heat and light energy is produced by a 100W electric lamp in 5 minutes?
c) what is the resistance of a 240V,60W bulb? - In this case I got 960 ohm (am I correct?)
Yes, on c.
I will be happy to critique your work on a, b.
Please stop posting under multiple names. My patience is running thin
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The bulb is rated 10w~220v it means that it can convert 10j of energy into heat and light
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