Hi all(adsbygoogle = window.adsbygoogle || []).push({});

need somebody to go thru my answers are actually correct for DC circuits...

thanks in advance...

question:

Two 1.55 V batteries are connected in series to power a lamp. One battery has an internal resistance r1 = 0.208 ohm, and the other has r2 = 0.169 ohm. When the switch is closed a current of 0.55 A flows and the lamp lights up.

answer:

What is the terminal voltage of the battery combination and what is the resistance R of the lamp filament?

question:

What fraction of power is dissipated in the batteries?

----------------------------------------------------------------------------------

can somebody advise me on how I get the fraction of power answer?

my conclusion was (correct me if I was wrong):

Power = V I, so

power in internal r Vi I

------------------------ = ------ = am I in the right track?

power in whole circuit V I

thanks again

cseet

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# Homework Help: Can somebody check my answers (DC-circuit)

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