Final answer:
Increasing current, decreasing resistance, or increasing voltage will all increase power delivery to a load in an electrical circuit, as they directly affect the power equation P = I^2R and follow Ohm's Law V= IR.
Step-by-step explanation:
To increase power delivery to the load in an electrical circuit, one may consider the following changes: increasing the current, decreasing the resistance, or increasing the voltage. According to the power formula P = I^2R (where P is power, I is current, and R is resistance), increasing the current or voltage, or decreasing the resistance would all increase power, assuming all other factors remain constant. In particular, if you double the current, the power increases by a factor of four, highlighting the significant effect of current on the power dissipated by the load. Similarly, according to Ohm's Law (V = IR), if you double the voltage across an ohmic resistor, the current also doubles, assuming the resistance remains constant. Therefore, adding resistors in parallel decreases the overall resistance, providing another method to increase current flow and, thus, power. Hence, all of the options mentioned can lead to increased power delivery to the load.