|  | 4.1 | Basics of Electricity
| 4.1.6 | Analogy for voltage, resistance, and current
The water analogy helps to explain concepts of electricity. The higher the water, and the greater the pressure, the more the water will flow. The water current depends on how much the tap (valve) has been opened. Similarly, the higher the voltage, and the greater the electrical pressure, the more current will be produced. The electric current then encounters resistance which like the water tap reduces the flow. If it is on an AC circuit, then the amount of current will depend on how much impedance (resistance) is present. The pump is like a battery. It provides pressure to keep the flow moving.