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Homework Statement
Consider the circuit shown in the figure below. (R = 31.0 Ω.)
(a) Find the current in the 31.0 Ω resistor.
(b) Find the potential difference between points a and b.
Homework Equations
The Attempt at a Solution
I am reading the solution of this problem given by the author, and for the most part I understand it, except for this one critical part:
"In diagram (iii), the current above goes through the equivalent resistor [itex]R_{iii}[/itex] to give a voltage drop across this resistor of [itex]ΔV = IR_{iii}[/itex]. n diagram (ii), we see that this voltage drop is [itex]ΔV_{ab}[/itex] and is the same across the 10.0Ω resistor and the 5.00Ω resistor."
Why is the voltage drop the same across the two resistors in parallel?
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