27. Resistors & DC Circuits

There is a junction of three wires. $2.0\text{A}$ flow into the junction along one path, and $3.5\text{A}$ flow out along another path. How much charge flows in or out along the third path in $3.0\mathrm{ s}$?

In the figure, $I_{\neg <mi\; mathvariant="normal">a</mi>}=12$and $I_{\mathrm{b}}=8.0\mathrm{A}$. What are $I_{\mathrm{c}}$ and $I_{\mathrm{d}}$?

Five wires intersect at a point. Wires A, B, and C carry currents $3.0\text{A}$ into the point, $1.0\text{A}$ out of the point, and $4.5\text{A}$ into the point, respectively. What can you say about the remaining two wires, D and E?

Which of the following statements is correct?

The 10.00-V battery in Fig. E26.28 is removed from the circuit and reinserted with the opposite polarity, so that its positive terminal is now next to point a. The rest of the circuit is as shown in the figure. Find (a) the current in each branch.