Final answer:
The primary application of voltage divider networks is to provide variable voltage levels for different components within an electrical circuit, typically involving resistors in a series. High AC voltages are used in power transmission due to efficient long-distance transport and the ease of adjusting the voltage for end-user safety and appliance compatibility.
Step-by-step explanation:
The primary application of voltage divider networks is in electric circuits that require C. Variable voltage levels. Voltage dividers are used to obtain a voltage that is a fraction of the input voltage, making them ideal for circuits where various and specific voltage levels are needed for different components. The voltage divider rule is a simple method to calculate the divided voltage, which involves resistors in a series circuit.
In the context of power transmission, high voltages are transmitted from power plants using alternating current (AC) because it is more economical and losses due to long-distance transmission are reduced (low resistance, reduced current, and thus lower line losses). At the user's end, this high voltage from power lines is reduced to safe levels for use in homes. Additionally, high voltage can be transmitted with much smaller power losses than low voltages.
AC voltage can also be manipulated more easily than DC voltage, allowing for more convenient increases or decreases, making it preferred for large-scale power distribution systems. Appliances within homes are connected in parallel, which ensures they all receive the same voltage from the power lines, which is crucial for their proper operation.