basic 1 min read
Potential divider
The voltage distribution for the circuit shown in Figure 5.5(a) is given by
THE ARCHIVES
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Primary cells
Primary cells cannot be recharged, that is, the conversion of chemical energy to electrical energy is irreversible and the cell…
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Chemical effects of electricity
A material must contain charged particles to be able to conduct electric current. In solids, the current is carried by…
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Temperature coefficient of resistance
In general, as the temperature of a material increases, most conductors increase in resistance, insulators decrease in resistance, whilst the…
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Potential difference and resistance
For a continuous current to flow between two points in a circuit a potential difference (p.d.) or voltage, V, is…
basic 2 min read
An introduction to electric circuits
Standard symbols for electrical components Symbols are used for components in electrical circuit diagrams and some of the more common…
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Electrical potential and e.m.f.
The unit of electric potential is the volt (V) where one volt is one joule per coulomb. One volt is…
basic 2 min read
Units associated with basic electrical quantities
SI units The system of units used in engineering and science is the Systeme Inter- ` nationale d’Unites (International system…
basic 1 min read
Multiplexers
Overview A multiplexer is a device that brings the concept of a rotary switch in analog electronics to the digital…