- #1
cseet
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Hi all
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
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