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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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Purity Test of Purified Water (For School & College level lab practical)

Purity Test of Purified Water Requirement : Test tube, test tube holder, test tube rack, labeling materials (pen, paper, scissors, gum).  Reagent : Litmus paper (red and blue), BaCl 2 , AgNO 3 , Ammonium Oxalate, NH 4 OH, Nessler's Reagent, Sodium Sulfide, Ingredients: Supplied purified water.  Procedure: Experiment 1: Some amount of purified water is taken in a test tube.  Observation : Clean, colorless, odorless. Inference : May be pure. Experiment 2: Litmus Test: Some amount of purified water is taken in a clean test tube. (a) A blue litmus paper is dipped into the solution. (b) A red litmus paper is dipped into the solution.  Observation : (a) The colour of blue litmus paper is not changed. (b) The colour of red litmus paper is not changed. Inference : (a) Absence of Acid. (b) Absence of alkali. Experiment 3: Some amount of purified water is taken in a test tube. Few ...
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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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