Carrier Archive

Capacitors and capacitance

Capacitance (symbol C) is a measure of a capacitor’s ability to store charge. A large capacitance means that more charge can be stored. Capacitance is measured in farads, (symbol F). However 1F is very large, so prefixes

The Maximum power transfer theorem

Earlier it was demonstrated the existence of internal resistance in the power supply such as in a battery, and the effect that this resistance has on the voltage supplied to the load was discussed. The load voltage

Connection of Cells

All cells contain an internal resistance caused by factors such as the plate material and size etc. In primary cells this resistance is quite high, with secondary cells due to the plates having a much larger cross

Alkaline Batteries

There are several types of alkaline batteries, so to differentiate the types, the metal used in the manufacture of the plates usually gives them their name, for example the most common in use on aircraft is the

Lead Acid Batteries

Construction These batteries use an impact and acid resistant case for each individual cell, which is made from polystyrene compounds. Each cell case is moulded so that they provide outlets for the terminal posts so that each

Coulomb and Electron Theory

We have seen that a current of electricity ( ) is a flow of electrons but the electron itself is too small to be of use as the unit of electrical quantity and therefore a more practical