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Optical transducer
The optical transducer convert light into electrical quantity. They are also called as photoelectric transducers. The optical transducer can be classified as photo emissive, photoconductive and photovoltaic transducers. The photo emissive devices operate on the principle that
Advantages and disadvantages of electronic multimeter
There are some advantages of electronic multimeter which are given below, The input impedance is high. The frequency range is high. The construction is rugged. The circuit is simple. It is less suffered from electric noise. The
Conduction of current through P type semiconductor
When we connect a battery across a P type semiconductor let us see that what happens. The free electrons and holes experience the force towards the battery terminals. The free electrons will tend to move towards the
Conduction of current through N type semiconductors
Let us see what happens if we connect a battery across an N type semiconductor as shown in below figure. The free electrons and holes experience the force towards the battery terminals. The free electrons will tend
Temperature effect on conductivity
An intrinsic semiconductor at absolute zero, behaves as a perfect insulator. The amount of energy required to break a covalent bond is 0.72 eV in case of germanium and 1.11 eV in case of silicon. Equivalently, we
Advantages, disadvantages and applications of piezoelectric pressure transducer
There are some advantages of piezoelectric pressure transducer which are given below, Rugged construction and small size. Excellent frequency response. High output with negligible phase shift. There are some disadvantages of piezoelectric pressure transducer which are given
Capacitor testing with ohmmeter
Three capacitor defects are detectable with an ohmmeter are short, open and partial short. If the capacitor is in a ciruit, it must be separated by disconnecting one lead. The shorted capacitor has a dilectric breakdown. When
Types of logic analyzer
There are two types of logic analyzers which are given below, Logic timing analyzer Logic state analyzer Logic timing analyzer : In this device, the data is sampled according to a clock signal generated at regular intervals
What are the semiconductor materials?
The example of semiconductor materials are germanium (Ge), silicon (Si), carbon (C), selenium (Se), gallium arsenide (GaAs), cadmium sulphide (CdS) etc. A large number of semiconductor materials are known, but the most frequently used in applications are
Advantages and disadvantages of bridge rectifier
Advantages: Transformer utilization factor, in case of a bridge rectifier, is higher than that of a centre-tap rectifier. It can be used in application allowing floating output terminals, i.e. no output terminal is grounded. The need for