Consider the circuit shown in the figure below. (Let R1 = 3.00 Ω, R2 = 6.00 Ω, and = 6.00 V.)
(a) Find the voltage across R1.
(b) Find the current in R1.
sketch: http://www.webassign.net/serpse8/28-p-019-alt.gif
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Answers & Comments
Verified answer
There are soo many ways to solve this... Here's what I believe to be the easiest.
a) Just combine the resistances together and use the voltage divider rule.
So...
V_R1 = 6 * [ ( 10 || 5 + R2 ) || R1 ] / [ ( 10 || 5 + R2 ) || R1 + 2 ]
b) Once you have V_R1, the current through R1 will obviously be:
I_R1 = V_R1 / R1