Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Current Electricity • An electrical current is a flow of charged particles (electrons or ions) through a circuit • In a circuit with a battery or chemical cell, electrons flow from a negative terminal to a positive terminal through the circuit • Conductors are materials through which a current can flow • Metals are good conductors • Other materials like carbon or water are also good conductors • Schematic diagrams are diagrams of electric circuits • Symbols are used to represent different parts of an electrical circuit Schematic Diagram Series and Parallel Circuits • Series circuits have a single pathway for the current • Parallel circuits have more than one pathway for the current • Meters are used to measure current, voltage or resistance in a circuit Current • a measure of the number of charged particles passing a point in a given time • measured in amperes (A) or amps • 1A = 1 coulomb of charge per second • Symbol for current is I • An ammeter is used to measure current in a circuit • Ammeters are connected in series Conventional Current • In an electric circuit, electrons actually flow from the negative terminal to the positive terminal • In conventional current, we assume they are flowing from positive to negative Voltage • a measure of the amount of electrical energy carried by each charged particle in a circuit • measured in Volts (V) • A voltmeter is used to measure voltage • A voltmeter is connected in parallel Resistance • A resistor resists the flow of current in a circuit • Resistors convert electrical energy into other forms such as heat or light • Resistance (R) is measured in Ohms (Ω)