In Fig. 6–28, solve for a. $R_\text{T}$. b. $I_\text{T}$. c. $V_1$, $V_2$, and $V_3$. d. $I_1$ and $I_2$.

In Fig. 6–26, a. What is the equivalent resistance of $R_1$ and $R_2$ in parallel across points A and B? b. What is the total resistance, $R_\text{T}$, of the circuit? c. What is the total current, $I_\text{T}$, in the circuit? d. How much voltage exists across points A and B? e. How much voltage is dropped across $R_3$? f. Solve for $I_1$ and $I_2$. g. How much current flows into point B and away from point A?

A voltage $V_1$ of $40\text{ V}$ is connected series-opposing with $V_2$ of $50\text{ V}$. The total voltage across both components is (a) $10\text{ V}$; (b) $40\text{ V}$; (c) $50\text{ V}$; (d) $90\text{ V}$.

In Fig. 6–17, what is the maximum unknown resistor, $R_\text{X(max)}$, that can be measured for the resistor values shown in the ratio arm? a. $99.99\space\Omega$. b. $9,999.99\space\Omega$. c. $99,999\space\Omega$. d. $999,999\space\Omega$.

In Fig. 6–25, solve for a. branch currents $I_1$, $I_2$, $I_3$ and the total current, $I_\text{T}$. b. $R_\text{T}$. c. $V_1$, $V_2$, $V_3$, $V_4$, and $V_5$.

A $10$-$\Omega$ $R_1$ and a $20$-$\Omega$ $R_2$ are in series with a $30\text{-V}$ source. If $R_1$ opens, the voltage drop across $R_2$ will be (a) zero; (b) $20\text{ V}$; (c) $30\text{ V}$; (d) infinite.

In Fig. 6–17, assume that the bridge is balanced when $R_\text{S}$ is adjusted to $15,000\space\Omega$. How much is the total current, $I_\text{T}$, flowing to and from the terminals of the voltage source, $V_\text{T}$? a. zero. b. approximately $727.27\space\mu\text{A}$. c. approximately $1.09\text{ mA}$. d. approximately $1.82\text{ mA}$.

In Fig. 6–17, assume that the current in $M_1$ is zero when $R_\text{S}$ is adjusted to $55,943\space\Omega$. What is the value of the unknown resistor, $R_\text{X}$? a. $55,943\space\Omega$. b. $559.43\space\Omega$. c. $5,594.3\space\Omega$. d. $10\text{ k}\Omega$.

In a circuit with three parallel branches, if one branch opens, the main-line current will be (a) more; (b) less; (c) the same; (d) infinite.

In Fig. 6–24, solve for a. branch currents $I_1$, $I_2$ and the total current, $I_\text{T}$. b. $R_\text{T}$. c. $V_1$, $V_2$, $V_3$, and $V_4$. d. $P_1$, $P_2$, $P_3$, $P_4$, and $P_\text{T}$.

In Fig. 6–23, a. What is the total resistance of branch $1$? b. What is the resistance of branch $2$? c. How much are the branch currents $I_1$ and $I_2$? d. How much is the total current, $I_\text{T}$, in the circuit? e. How much is the total resistance, $R_\text{T}$, of the entire circuit? f. What are the values of $V_1$, $V_2$, $V_3$, and $V_4$?

A $5\text{-V}$ source and a $3\text{-V}$ source are connected with series-opposing polarities. The combined voltage across both sources equals (a) $5\text{ V}$; (b) $3\text{ V}$; (c) $2\text{ V}$; (d) $8\text{ V}$.

In Fig. 6–17, how much voltage exists between terminals C and D when the bridge is balanced? a. $0\text{ V}$. b. $10.9\text{ V}$. c. $2.18\text{ V}$. d. $12\text{ V}$.

In Fig. 6–22, a. What is the total resistance of branch $1$? b. What is the resistance of branch $2$? c. How much are the branch currents $I_1$ and $I_2$? d. How much is the total current, $I_\text{T}$, in the circuit? e. How much is the total resistance, $R_\text{T}$, of the entire circuit? f. What are the values of $V_1$, $V_2$, $V_3$, and $V_4$?