Voltage drop is the natural reduction in electrical potential that occurs as current travels through a circuit, from the power source to a device. This happens because all wires inherently have resistance, which converts some electrical energy into heat, leading to a loss of voltage. While minor voltage drop is normal, excessive amounts can cause problems like dimming lights, slow or overheating motors, and erratic electronic behavior. It can also lead to higher energy consumption and, in severe cases, create safety hazards due to overheating wires. Key factors influencing voltage drop include the wire's length and thickness (gauge), the amount of current flowing through it, and the quality of electrical connections.