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December 20, 2014

Homework Help: Physics - Can you plz help!

Posted by Bimbo on Tuesday, April 17, 2007 at 10:18am.

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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