P 5.2-4 Determine the value of the current i_a in the circuit shown in Figure P 5.2-4.

Figure P 5.2-4

Starting on left end we can do the following source transformation

To

And then we can add the 3 kΩ Resistor in parallel

And do this source transformation to get

On the right end we can do this source transformation

And get

Then add the 4 kΩ Resistor in parallel

And do this transformation

We now have a simple series circuit that looks like

A voltage walk let’s us calculate Start below 4 V source and walk clockwise and we get:

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This page last updated on February 17, 2019