Question
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
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
Answers
sonika
The bulb is rated 10w~220v it means that it can convert 10j of energy into heat and light