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P 3.4-4 Determine the current i in the circuit shown in Figure P 3.4-4. |
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Figure P 3.4-4. |
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Consider the 6 A current
arrives at the bottom center node and from that node
there are two 8 Ω
resistors, so the current divides evenly and each resister carries 3 A. Now at the point where the shorting wire is
the 6 A current sees one resistor is twice as much as the other (16 Ω vs 8 Ω)
so the current has 1/3 or 2 A go through the larger resistor and 2/3 or 4 A goes through the lower
resistor. So since the left side goes
from 3 A to 2 A and the right side goes from 3 A to
4 A, i must be 1 A! |
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