We go through solving a circuit which only containes independent sources: two voltage sources and two current sources. KVL and KCL are used to determine voltages and currents.
Determine the amount of power absorbed or supplied by each source.
The superposition theorem states that the response (voltage or current) in any branch of a linear circuit which has more than one independent source equals the algebraic sum of the responses caused by each independent source acting alone, while all other independent sources are turned off (made zero). (more…)
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using superposition rule:
, 
, 
, 
,
,
is in series with the current source; therefore, the same current passing through it as the current source:
and 
. (Hint: there is no need to use nodal analysis; voltages between nodes can be easily found by the voltage sources.)
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