To derive the relations between line and phase currents and voltages of a star connected system, we have first to draw a balanced star connected system. Suppose due to load…
The mathematical expression for magnetic flux density was derived by Jean Baptiste Biot and Felix Savart. Talking the deflection of a compass needle as a measure of the intensity of…
[vc_row][vc_column width="2/3"][vc_column_text]Energy conservation is becoming more and more of a concern. One solution is to use more energy efficient bulbs at home, schools, businesses and public places. Key Terms: Watt…
[vc_row][vc_column width="2/3"][vc_column_text] Parts of an Oscillator Most oscillators consist of three basic parts: Figure 1.The Essential Elements of an Oscillator An amplifier. This will usually be a voltage amplifier and…
[vc_row][vc_column width="2/3"][vc_column_text] Figure 1.Potentiometer Construction Resistive Controls Controls that produce a varying voltage using resistance are called either potentiometers or variable resistors. Although both types of control may be physically…
[vc_row][vc_column width="2/3"][vc_column_text] What is an Oscillator? Figure 1.Oscillator (AC Source) Circuit Symbol An oscillator provides a source of repetitive A.C. signal across its output terminals without needing any input (except…
[vc_row][vc_column width="2/3"][vc_column_text] Why so many Number Systems? Ask many people what the most commonly used number system is, and they would probably reply (after a bit of thought), the decimal…
[vc_row][vc_column width="2/3"][vc_column_text] Two Types of Track Two types of potentiometers with different tracks are available. These are Linear (Lin) or Logarithmic (Log) tracks. Figure 1.Logarithmic and Linear Variation With linear…
It is often necessary to convert values written in one number system to another. The simplest way is to reach for your calculator or use a conversion app. from the…
L.T. (Low Tension) cables are widely used for low voltage (1.1kV). These cables must have proper protection from water, corrosion and mechanical strength must be high. These cables must sustain…