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KNOW ABOUT BASIC ELECTRICAL AND ELECTRONIC DEVICES

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Nowadays, we are familiar with the, electricity and various electrical instruments. There are many things  e.g light, fan, TV, refrigerator,switch,fuse etc. in our house. We use this instruments. But we frequently listen some terms and devices name viz. voltage, current, AC Current, DC Current, resistor, transformer, capacitor, LED, inductor etc . which we don't use these directly. But, amazing fact is that, the instruments which we daily use, are made of these(resistor, capacitor etc.).  Let's discuss these. Here, I don't discuss these so deeply. What is Voltage? and  What is Current? Voltage( Potential difference) represents the force. And Current represents the flow of electrons in the circuit. We (who are the basic users or novice) need not know much about this. It is a image of mobile charger.See what is written as input and output The unit of voltage is volt ( v ) and current is ampere ( A ). 1mA=(1/1000) A You obviously heard the term...
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FUNCTION OF BASS, TREBLE, VOLUME OPTION IN AN AMPLIFIER

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Bass and Treble options are used to regulate the sound on the basis of frequency.  Generally a audio amplifier has 3 main controlling options. (i) Volume or Master  (ii) Bass (iii) Treble Volume : When we increase Volume the loudness of the audio is increased. In frequency level, the amplitude of all the frequencies are increased.  Similarly, when we decrease Volume, the loudness is decreased i.e. amplitude of all the frequencies are decreased. Bass : When we increase Bass, the loudness of only lower frequencies are increased i.e. amplitude of the lower frequencies are increased. When we decrease Bass, the loudness of only lower frequencies are decreased i.e. amplitude of the lower frequencies are decreased. Treble : When we increase / decrease the Treble, the loudness of the sound of only higher frequencies are increased / decreased. Now the main questions is that what do lower and higher frequencies mean ? We know that human beings able to h...
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MEASUREMENT OF RESISTANCE USING COLOR CODE

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Carbon resistor When we use resistor, it is necessary to measure resistance of that. But it is not always convenient to measure the resistance of a resistor using device. Usually, the wirewound  resistor are physically big and hence there are enough space to print the resistance value and tolerance value. but carbon resistor are small physically. so it is not convenient to print the value on it. Hence, the manufactures generally use a color code to indicate their value and tolerance. COLOR CODE : In this coding system colors are coded as 0,1,2,3,.....8,9. First, we know the color and its code  then we learn how to calculate the resistance seeing the color printed on carbon resistor. Color Code Black 0 Brown 1 Red 2 Orange 3 Yellow 4 Green 5 Blue 6 Violet 7 Gray 8 White 9                ...
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