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 Electronics Learn electronics, understand electronics and apply electronics in your daily life.

Basic Materials for Electronics: Conductor, Insulator and Semiconductor Today electronics is very important in our modern life. We are surrounded by electronics devices. From morning to night, every time, every second we use electronic devices to accelerate our daily work, to make our life easier. Computer, TV, mobile and there are thousands of electronic device which are mode of diode, transistor and integrated circuits. To understand how these devices work, we first have to study and understand the semiconductor materials that neither conductors nor insulators. Semiconductor contains some free electrons but these amounts of electrons are not sufficient to use in practical application. Depending on the conductivity or presence of electrons in a material, materials are divided into three categories.                         1. Conductor                                           2.    Semiconductor                                    3.   Insulator From Bohr’s atom m

Series RLC circuit acting as a Resistor, Capacitor and Inductor  When a resistor R, capacitor C and inductor L are connected in series with a ac supply voltage, then this circuit is called a series RLC circuit. This circuit can use in three different ways in practical use.       1.         As inductor 2.       As capacitor and 3.       As resistor Fig-1:  Series RLC circuit When acts a inductor, RLC circuit will show all the properties of an inductor i.e 1.       This circuit will store energy in  the form of magnetic flux 2.       For ideal case, Phase difference between current and voltage will be 90 degree. 3.       Voltage will lead current by 90 degree. When acts a capacitor, RLC circuit will show all the properties of an capacitor i.e 1.       This circuit will store energy in  the form of electric charge. 2.       For ideal case, Phase difference between current and voltage will be 90 degree. 3.       Current will lead voltage by 90 deg

RL Circuit: When a resistor (R) and a inductor (L) are connected in series with a ac voltage source (v), then it is called series RL circuit. It is a first order differential circuit.  In this circuit, the values of R , L and v are fixed. By varying the frequency of the applied voltage, this RL circuit acts as a resistive circuit and inductive circuit. Fig-1: RL Circuit Total impedance of the circuit  Z  = sqr(R 2   + X L 2 ) From the above equation we see that , total impedance of a RL circuit consist of resistance and inductive reactance. The total impedance changes with frequency.   RL circuit acting as a Resistor:  As we know that, Inductive reactance, X L  =  2πfL,  that is inductive reactance increases  with increasing signal frequency. So at low frequency, the RL circuit acts as a resistive circuit, because at low frequency, inductive reactance will be much much lower than the resistance. And the circuit will act as a resistor and shows all the prop

  Electronics in Practical Life The first question comes in our mind is what is electronics and why world run behind the electronics. What is the power of electronics and how electronics change our life style with its magical power? In our everyday life, we are surrounded by electronics devices and if I say we can’t stay a single moment without the help of electronics, it will not be probably false now days. Every moment we use electrical and electronic devices to make our life easy. We wake up in the morning by hearing the alarm and go to bed for sleep after watching television or using computer. In our everyday life, we use numerous electrical and electronic devices to make our life easy and perfect. Every moment we use our mobile for numerous purposes which is one of the magic of electronics. So in a body, we can say without the help of electronics our life would be so difficult. " Electronics is the game of electrons" So the question that comes in o

RC Circuit: When a resistor and a capacitor are connected in series with a ac voltage source, then it is called series RC circuit. It is a first order differential circuit.  In this circuit, the values of R , C and applied voltage are fixed. By varying the frequency of the applied voltage, this RC circuit acts as a resistive circuit and capacitive circuit. Fig : - RC circuit Total impedance of the circuit  Z  = sqr(R 2  + X c 2 ) From the above equation we see that , total impedance of a RC circuit consist of resistance and capacitive reactance. The total impedance changes with frequency. RC circuit acting as a capacitor:  As we know that, Capacitive reactance, X c = 1 / 2πfC,  that is capacitive reactance decrease with increasing signal frequency. So at low frequency, the RC circuit acts as a capacitive circuit, because at low frequency, capacitive reactance will be much much greater than the resistance. And the circuit will act as a capacitor and sh

Identification of resistor, capacitor and inductor using Ohm meter In our previous section, we discussed about the ac and dc response of a resistor, capacitor and inductor. In this section we will discuss, how do we identify resistor, capacitor and inductor using ohmmeter. Before going to discuss, we should kept in mind the following fact. In a circuit, 1. When voltage is maximum, current will be minimum. 2. When current is maximum , voltage will be minimum 3. If resistance is maximum, current will be minimum and voltage will be maximum 4. If resistance is minimum , current will be maximum and voltage will be minimum 5. If resistance increases with time, than, voltage will also increase with time and current will      decrease with time. 6. If resistance decreases with time, voltage will also decrease with time and current will increase   with time 1   Resistor identification using ohm meter As we know that, ohm meter is used to measure and identif