Electrical4U What is QAM (Quadrature Amplitude Modulation)? QAM (Quadrature Amplitude Modulation) is defined as a modulation technique that combines phase and amplitude modulation in a single channel. It transmits information by changing both the amplitude and phase of a carrier wave, doubling the effective bandwidth. QAM is also known as quadrature carrier multiplexing. A QAM signal … Read more
What is Dielectric Grease? Dielectric grease is defined as a silicone-based grease used to protect electrical components from dirt, moisture, and corrosion. It is also known as silicone grease. It is a non-conductive, waterproof grease made by combining silicone oil with a thickener. It helps transfer heat from electrical devices. What is Dielectric Grease Used … Read more
What is Permeance? Permeance is defined as a measure of how easily magnetic flux can pass through a material or magnetic circuit. It is the reciprocal of reluctance and is directly proportional to the magnetic flux. Permeance is denoted by the letter P. $ Permeance (P) = \frac {1} {Reluctance(S)} $ From the above equation, … Read more
What is Reluctance? Magnetic reluctance, also known simply as magnetic resistance, opposes the production of magnetic flux in a magnetic circuit. It is a characteristic of materials that resist the formation of magnetic flux. In an electrical circuit, the resistance opposes the flow of current in the circuit and it dissipates the electric energy. The … Read more
What is an LC Circuit? An LC circuit (also known as an LC filter or LC network) is defined as an electrical circuit composed of two passive circuit elements: an inductor (L) and a capacitor (C). This setup is also referred to as a resonant, tank, or tuned circuit. In its ideal form, an LC … Read more
What is an RC Circuit? An RC circuit (also known as an RC filter or RC network) stands for a resistor-capacitor circuit. An RC circuit is defined as an electrical circuit composed of the passive circuit components of a resistor (R) and capacitor (C), driven by a voltage source or current source. Due to the … Read more
What is Impedance Matching? Impedance matching is defined as the process of designing the input impedance and output impedance of an electrical load to minimize the signal reflection or maximize the power transfer of the load. An electrical circuit consists of power sources like amplifier or generator and electrical load like a light bulb or … Read more
What is Load Factor? In electrical engineering, Load Factor is defined as the ratio of the average load to the maximum load over a specific period. In other words, it is the ratio of total energy used to the total possible energy available within that period. Load Factor can be calculated daily, monthly, or yearly. … Read more
What is a Butterworth Filter? A Butterworth filter is a type of signal processing filter designed to have a frequency response as flat as possible in the passband. Hence the Butterworth filter is also known as “maximally flat magnitude filter”. It was invented in 1930 by the British engineer and physicist Stephen Butterworth in his … Read more
What is a Bleeder Resistor? A bleeder resistor is a standard resistor connected in parallel with the output of a high-voltage power supply circuit for the purpose of discharging the electric charge stored in the power supply’s filter capacitors when the equipment is turned OFF. This is done for safety reasons. If someone accidentally touches … Read more