Final answer:
To make threading electrode wire easier, using a lubricant is the best option as it reduces friction. Decreasing tension can also help, whereas increasing tension may impede the threading process. For electrical transmission, reducing resistance is key to increasing current and power dissipation in a circuit.
Step-by-step explanation:
To make threading electrode wire easier, the best option would be c. Use a lubricant. This will decrease the friction between the wire and the threading tools or guides, making it slide through more easily. Decreasing tension might also be helpful to a certain extent; however, if the wire is not adequately tense, it may tangle or become difficult to control. A larger electrode could be useful in some contexts but is not necessarily related to the ease of threading. Increasing tension could make threading more challenging and could damage the wire or threading equipment.
In relation to other electrical transmission scenarios, for instance, increasing the current would involve reducing resistance during transmission, not increasing tension. Drawing a wire through a die increases its length and decreases its diameter, which will result in a huge increase in resistance, according to the principles of electrical resistance.
Finally, to increase the power dissipated in a circuit while keeping the current constant, you would reduce the resistance in the circuit rather than reducing the voltage, according to Ohm's law and the power formula (P=IV, where P is power, I is current, and V is voltage).