In this article we are going to study Current Gain in Transistor of Common Base Transistor and Common Emitter Transistor. Along with the formula of current gain in transistor. Current gain in Common Base Transistor Large signal current gain (α) D.C. current gain (αdc) Small signal current gain (α‘or hfb). Large signal current gain (α) … Read more
Semiconductor are classified into two classes: Intrinsic (or pure) semiconductors Extrinsic (or impure) semiconductors Intrinsic Semiconductors A semiconductor in an extremely pure form is known as intrinsic semiconductor. A semiconductor is not truely intrinsic (or pure) unless its impurity content is less than one part in 100 million parts of semiconductor. In an intrinsic semiconductor, … Read more
Static and Dynamic resistance of Diode In a junction diode, applied voltage (V) is not proportional to the diode current and hence it does obey Ohm’s law. So junction diode is the example of non-ohmic conductor. The resistance of a is the function of the operating current. Diode has two possible resistances i.e. d.c. or … Read more
In this article we are going to study Digital signal and Analog signal along with example of digital and analog signal also the difference between digital and analog signal. Electronic signals are of two types i.e. Digital signal and Analog signal. Analog signal Definition Analog signal is a continuous time varying current or voltage signal … Read more
We have studied that as the voltage across reverse bias PN junction increase to certain value, called breakdown voltage, high reverse current is caused by which may damage the junction diode. Before studying the difference between Avalanche breakdown and Zener breakdown we have to study two mechanism by which breakdown can occur, when PN junction … Read more
Thevenin’s theorem is an important tool to avoid lengthy and difficult calculation in network analysis. Thevenin’s Theorem Definition According to Thevenin’s theorem,” any two-terminal linear network can be replaced by an equivalent circuit consisting of a voltage source (V) in series with the impedance (Z).“ The value of V is one which is presented to … Read more
Why zener diode as voltage regulator Because a Zener diode is used as a voltage stabiliser or voltage regulator to provides a constant voltage from a source whose voltage may fluctuate over a wide range. The circuit diagram of a Zener diode as a voltage stabiliser is shown in Fig. This is the “circuit diagram … Read more
According to wien’s displacement law, the wavelength (λm) corresponding to maximum energy density is inversely proportional to the absolute temperature (T) of the body. This is called wien’s displacement law formula. Where b=0.2898 cm and b is called Wien’s constant. Derivation of Wien’s displacement law formula Wien’s displacement law derivation from Plank’s law According to … Read more
Those types of Energy sources which can be renewed again and again are called renewable sources of energy. They are available in very large amount and probably they will never exhaust. These are most popular types of renewable sources of energy Solar energy Wind energy Hydro energy Tidal energy Geothermal energy Biomass energy How these … Read more
Maxwell–Boltzmann statistics Classical statistics is generally known as Maxwell–Boltzmann statistics because it got its birth from Maxwell’s law of distribution of molecular speed and Boltzmann’s theorem relating entropy and probability. The classical statistics i.e. Maxwell-Boltzmann statistics explains successfully many observed phenomenon like temperature, pressure, energy etc. On the other hand, it fails to explain certain … Read more