9 mistakes you’re making at the airport

FROM the baggage drop to the security line to the boarding gate, just getting through the airport these days can throw pitfalls that you never saw coming. Here are nine typical airport mistakes you may be making,

Flight attendants reveal 9 ‘behind the scenes’ secrets – which most passengers don’t know about

Once upon a time, jetting off on an airplane used to be the preserve of the super-wealthy.Nowadays, thanks to relatively recent rise of budget airlines, increasingly competitive airfares and more flight paths, experiencing an overseas holiday has

The real reason you’re told you put your mobile in flight mode

“Please set your portable electronic devices, including any mobile phones, to flight mode.” It is a plea heard by passengers at the beginning of thousands of flights around the world each day, and an instruction the vast

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

Generation of electricity

Electricity can be generated in 6 basic ways. These are by:  Chemical Action.  Friction.  Pressure.  Light.  Heat.  Magnetism and Motion. We shall look at these methods briefly. Chemical Action (Cell) This

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