Testing of transformers

Following tests are carried out on the transformer to check weather it is good or bad. Winding resistance test : This test is carried out to reveal any open circuited windings. It is carried out by using

Advantages and disadvantages of hall effect transducer

There are some advantages of hall effect transducer which are given below, High speed operation over 100 KHz possible. Whereas at high frequencies the inductive or capacitive sensor output begins to distort. Non contact operation so there

Temperature effect on extrinsic semiconductors

We already know that the addition of a small amount of donor or acceptor impurity produces a large number of charge carriers in an extrinsic semiconductor. In fact, this number is so large that the conductivity of

Difference between analog storage and digital storage oscilloscope

Analog storage oscilloscope Digital storage oscilloscope The analog storage oscilloscope has higher bandwidth and writing speed. The digital storage oscilloscope has lower bandwidth and writing speed than analog storage oscilloscope. In analog storage oscilloscope, CRT is expansive

What are the properties of semiconductor?

The conductivity of a semiconductor is less than that of a conductor but more than that of an insulator. Semiconductor have negative temperature coefficient of resistance i.e. the resistance of a semiconductor decreases with the increase in

Two stage RC coupled CE amplifier

The RC coupling is the easy and most commonly used method of cascading of wideband amplifier or audio amplifier stages. The AC voltage signal developed across the collector load of each stage is coupled through the capacitor

Difference between PN junction diode and point contact diode

PN junction diode Point contact diode Its junction capacitance is low about 0.008 μF to 20 μF The barrier layer capacitance at the point is very low about 0.1 pF to 1 pF. Its operating frequency is

Features of 3-pin voltage regulators

There are some salient features of 3-pin IC voltage regulators which are given below, It has built-in all protection circuits. It does not require any feedback connections. It does not require any external component for normal operation.

Advantages, disadvantages and applications of single stage RC coupled CE amplifier

Advantages: It has wide frequency response and large bandwidth. It is most convenient and least expensive amplifier. It provides high audio fidelity. It has low amplitude distortion. It provides low frequency distortion. Disadvantages: It has a tendency

Working of AC tachogenerator

The AC tachogenerator is used to measure the speed only in one direction. In AC tachogenerator the armature is provided with an AC winding, either single phase or three phase windings. Working: When the rotor is stationary