PROTST When working with circuits, the potential diffe is called the voltage of the battery. The symbol for voltage is V. Voltage using an instrument called a voltmeter. Exploration 1.2 Carrent When the battery (or power supply) and other circuit elements, such as bulbs or wires an connected in a closed loop, charge can flow through the wires. The amount of charge pe unit time passing a cross-sectional area of a wire is called the current. The symbol for current is 7. Mathematically. 1 = AQ The unit of current is the Ampere (A). One Ampere is equal to one Coulomb per secc 1A = 1C/s. Current is measured using an instrument called an ammeter. Set up a simple circuit with one power supply, one bulb, and two wires. A circuit dis is shown below. Is the amount of current flowing through each of the wires the same or is different? Are any of the models below correct models for current flow? I Model A Current flows from the power supply to the bulb and is comple up in the bulb None of the current returns to the b