What unit is used to measure the pressure that pushes charged electrons through a circuit?

The voltage, measured in volts, is the unit that quantifies the electric potential difference or pressure that encourages charged electrons to flow in a circuit. It can be thought of as the driving force that moves electric current through various components of an electrical system.

Understanding voltage is crucial in the context of circuits, as it determines how easily electrons can move. A higher voltage means a stronger push for the electrons, resulting in more current flowing through the circuit, assuming the resistance remains constant.

Other units mentioned in the choices serve different roles in electrical equations. Ohms measure resistance to the flow of current, watts measure power, indicating how much energy is used or produced, and amperes measure the flow of electric charge (current). However, when it comes to the specific pressure driving that flow, voltage (volts) is the essential unit.