Chapter Questions
Four loads are connected in series across 110 volts DC. The loads fail to operate. A voltmeter connected in succession across each device reads 0 across the first three loads and 110 volts across the fourth load. What circuit fault is indicated at the fourth load? __________________________
Four loads are connected in series across 120 volts and a 3-ampere current exists. One load fails to operate. The voltage across each of the other devices is 40 volts. What circuit fault is indicated? __________________________
State three characteristics of a series circuit. __________________________
Find the voltage drop across a 10-ohm resistor, if the current through the resistor is 1.7 amperes. __________________________
Find the resistance of a resistor if the voltage drop across it is 51 volts, and the current through it is 3 amperes. __________________________
Solve for the unknown values in the circuit in Figure 3-9.FIGURE CANT COPYFIGURE P3.9$$\begin{aligned}& \mathrm{R}_{\mathrm{T}}= \\& \mathrm{I}_{\mathrm{T}}= \\& \mathrm{E}_1= \\& \mathrm{E}_2= \\& \mathrm{E}_3=\end{aligned}$$
Solve for the unknown values if $\mathrm{I}_{\mathrm{T}}=10$ amperes in Figure 3-10.FIGURE CANT COPYFIGURE P3.10$$\begin{aligned}& \mathrm{E}_1= \\& \mathrm{E}_{\mathrm{G}}= \\& \mathrm{R}_{\mathrm{T}}= \\& \mathrm{R}_2=\end{aligned}$$
Find $\mathrm{E}_1$ and $\mathrm{E}_2$ in the circuit in Figure 3FIGURE CANT COPYFigure 3-11 Finding voltages.
Find $\mathrm{E}_{\mathrm{T}}$ in Figure 3-12.FIGURE CANT COPYFigure 3-12 Finding total voltage.
If $\mathrm{E}_2=54$ volts, find $\mathrm{E}_1$ in Figure 3-13.FIGURE CANT COPYFigure 3-13 Finding voltage.
Using the circuit in problem 10, find $\mathrm{E}_2$ if $\mathrm{E}_1=6 \mathrm{~V}$.
Find $E_1$ and $E_3$ in Figure 3-14.FIGURE CANT COPYFigure 3-14 Finding voltages.
For the circuit in problem 12, find $\mathrm{E}_{\mathrm{T}}$ if $\mathrm{R}_2=4 \Omega$.
For the circuit in problem 12, if $I_{R_2}$ changes to $6 A$ and $R_2$ is unknown, find $E_3$.
In Figure 3-14, find the current through $R_3$ if $E_1=18$ volts and $I_{R_2}$ is unknown.
In Figure 3-14, if $\mathrm{I}_{\mathrm{R}_2}$ is unknown and $\mathrm{E}_3$ is 15 volts, find $\mathrm{E}_1$.