A Zenerdiode behaves like an ordinary diode up to a certain point. In other words, it acts as a one way electrical valve that allows electricity to flow in one direction only. It does this up to a certain point. However, when voltage acting against the normal flow rises to a certain point, the Zener collapses and conducts freely in both directions. It will continue to do that until the voltage acting against the Zener drops below a given value. Once this happens, the Zener again behaves like an ordinary diode.
In general engineering and calculations, when delta is placed in front of any value, it represents a change in that value. For example, in the definition of power, we talk about a metrichorsepower being when a mass of 1 kg is raised by a height of 1 metre in 1 second. The 1 second is represented by Δt (change in time), and the 1 metre is represented by Δh (change in height).
The co-efficient of friction between two surfaces is simply the relationship or ratio between those two forces. If I want to move a body along a surface at a constant speed, it will require a certain force. The magnitude (size) of that force depends upon the nature of the two surfaces in contact and the downward force pushing the two surfaces together.
Please note, if you want to contact the main Training Centre in Baldoyle, you need to ring 01-8167400.
If you want to contact the CP Fitters' Section, you can Contact Us by email, firstname.lastname@example.org, or by telephone: 00 353 1 8167543 This number gets you through to the CP Fitters' Section, Baldoyle Satellite Unit.
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