Increased load on a circuit causes lower voltage at the remote end. Which of the following actions will increase this voltage?

Increasing the voltage at the remote end of a circuit when there is an increased load can be effectively achieved by raising the stepdown transformer tap position. When you adjust the tap position of a transformer, you're effectively changing the voltage output. By raising the tap position, you increase the secondary voltage output of the transformer, which can help counteract the voltage drop caused by the load on the circuit. This means that even with higher demand on the circuit (which typically causes a voltage drop), the adjustment can help maintain a more stable voltage level, ensuring that the voltage at the remote end remains higher.

In terms of the other options, lowering the load on the circuit can help reduce voltage drop but does not directly address the voltage output mechanism like raising the tap does. Adding shunt capacitors can help manage reactive power and improve voltage levels, but it may not directly increase the voltage output from the transformer. Reducing the line length can also help with voltage drop but is not always feasible and may not be practical in many situations. The most direct and effective method to increase voltage output at a given load is to adjust the transformer tap position.