VOLTAGE AND CURRENT
2.1 INTRODUCTION
Nearly every day the word voltage is encountered. In our flashlights, we have all replaced
batteries that had different voltage levels, answering machines, calculators, bikes, and so on. It is
quite common knowledge that current is something that passes through the wires and creates
sparks and probably fire when there is a "short circuit." Current rent heats up the coils of an
electric heater or the range of an electric heater; this produces light when moving through a
bulb's filament; it causes twists and kinks in an electric iron wire over time, and so on.
This chapter describes and explores in some detail the basic influence of current and
voltage and the properties of each. Hopefully, any mysteries surrounding each one's general
features will be eliminated, and you will gain a clear understanding of each one's impact on an
electrical / electronic circuit.