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MathsTutor
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Homework Statement
I am a maths tutor - so physics is not my forte. One of my students asked for help regarding this question - it's been 4 years since I've used any of these calculations, and I don't have access to a textbook and so I desperately need some help. I have attached a copy of the circuit.
Question: a)Calculate the resistance of each lamp. b)Calculate voltage drop across each component, and current flow at each point between component. c) total power that the circuit is using.
Homework Equations
I=P/V and R=V/I
The Attempt at a Solution
Lamps c&d...
I=15/12=1.25 thus R=12/1.25=9.6?
Lamp e...
I=10/12 R=14.4
Lamp f
I=5/12 R=28.8
Thus as in parallel, 1/R(t)= 1/R(1) + 1/R(2)...
=1/9.6+1/9.6+1/14.4+1/28.8
1/R(t)=16/5
R(t)=3.2
Is this at all correct?
The series circuit confuses me though - can anyone help?