Electricity
Electricity can be compared to the flow of water. A power pack is similar to a water pump. The amount of amount of water that flows in a circuit is equivalent to electrical current which is measured in amps by an ammeter connected in series. The pressure of the water is equivalent to the electrical voltage which is measured in volts by a voltmeter. Resistance like a narrow pipe decreases the flow of water. Resistance in electrical circuits decreases the amount of current that flows through a particular circuit. Resistance is measured in ohms.
Electrical flow is due to the movement of electrons through a circuit. For the current to flow the circuit must be complete.
A series circuit is composed of one large continuous loop. It uses less power however, if one light globe blows then all the lights go out.
A parallel circuit is composed of numerous loops. It uses more power, however if one light globe blows the other light globes stay on.
