Finish the equation: W = E x ___.

The equation W = E x is referencing the relationship between work (or energy, W), voltage (E), and current in the context of electrical work. In this case, 'current' is the correct term to include in the equation, as it represents the flow of electric charge that, when multiplied by voltage, gives the amount of electrical work done or energy used over time.

In physics, or specifically in electrical engineering, the formula for electrical energy or work can also be expressed as W = V x I x t, where W is work in joules, V is voltage in volts, I is current in amperes, and t is time in seconds. By isolating the terms, if you take voltage (E) and multiply it by current, you directly relate it to the power (P), which is an expression of energy transfer over time.

This means that understanding current's role alongside voltage is crucial for grasping how energy is utilized in electric circuits. Hence, stating that W = E x current reinforces the fundamental principles of electricity: voltage pushes current through a circuit, generating work or energy consumption.