The document discusses different types of electricity including static electricity, where charges move randomly for a short time, and current electricity, where there is a steady flow of electric charge through a conductor. It also discusses the key components that allow electricity to flow, such as batteries, which provide a source of electrical energy through chemical reactions in electrochemical cells. The document also covers concepts like potential energy, voltage, current, resistance, and the factors that affect resistance.

1. Current Electricity

33. Potential Energy

48. Wider wires offer less resistance than thinner wires. If the wire doubles in width, its resistance is half as great. Conducting wires that carry large currents need large diameters to lessen their resistance. Diameter Longer wires offer more resistance than shorter wires. If the wire doubles in length, it doubles in resistance. Length As the temperature of the wire increases, its resistance increases and its conductivity decreases. In other words, a colder wire is less resistant than a warmer wire. Temperature Silver has the least resistance but is very expensive to use in wires. Most conducting wires are made from copper. Material How Factor Affects Resistance Factor