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?

Find the emfs ε_1 and ε_2 in the circuit of Fig. E26.26, and find the potential difference of point b relative to point a.