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Once any breaks have been connected once again and the continuity of the circuit re-established, it is known as a closed circuit.We now have the basis for switching lamps on and off by remote switches.Conventional current flow was deemed to go from the positive pole of a battery, given the symbol ( or vet) to the negative pole, given the symbol ( or vet).
In an open circuit the break in the continuity of the circuit prevents current throughout.
All it takes is a single break in continuity to open a circuit.
Therefore it will be able to carry more current and as a result, its resistance falls. From the line, it can be deduced that the voltage decreases with the increase in temperature.
As temperature increases, the resistance of the thermistor decreases.
The response time is the time taken by a sensor to respond to a change in input.
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When a sudden temperature change was applied, the bead thermistor was able to respond to it 3 times faster than the thermistor probe, therefore comparatively, its response time is very rapid.Firm foundations, however, will be quickly built upon leading to theoretical and practical examples covering the entire AS syllabus.It goes without saying then the parts of this book could also be used as a reference manual for other vocational and non-vocational courses in Electricity, Radio and Electronics, such as aspects of B-TECH Level 2 and 3 Engineering.All these devices contain electronic systems and sub-systems, some with simple circuitry, some with very complex circuitry but all with one thing in common, they need a source of electricity to make them work.This electricity is converted into signals in the equipment which either process (change in some way) information and/or direct its flow from one point to another.When the thermistor is subjected to a change of temperature of 80The resolution is the smallest change it can detect in the quantity it is measuring, or the precision with which the measurement can be made.When performing the experiment, the voltage value on the multi-meter constantly fluctuated, therefore an average had to be taken.Therefore, there are 2 main types, namely positive temperature coefficient (PTC) and negative temperature coefficient (NTC) thermistors.In a PTC thermistor, resistance increases with increasing temperature, whereas in a NTC thermistor, its resistance decreases instead.They offer mechanical, thermal and electrical stability, together with a high degree of sensitivity.The next question is, how does an NTC thermistor work?