Free Expert Guides on Power Systems, Circuit Design & Electrical Troubleshooting

What is Magnetic Resistance?Magnetoresistance definitionMagnetoresistance is the opposite of magnetic flux in the magnetic circuit, and its function is similar to resistance in a circuit.Magnetoresistive unit :AT/WbMagnetoresistance formulaThe calculation method of magnetoresistance is to divide the length of the magnetic circuit by the product of the free space permeability, the relative permeability of the material and the cross-sectional area of the magnetic circuit, namely :Influencing facto

What is Electrical Resistance?Resistance definitionThe obstruction of the conductor to the current is called the resistance of the conductor, and the resistance is also a physical quantity that describes the conductivity of the conductor.Factors that affect resistance Length of material The cross-sectional area of the material Properties of materials Environment temperatureThe basic formula of resistance The relationship between resistance, voltage and current (Ohm's Law) The relationship betwee

Resistance in series refers to the arrangement of individual resistors end to end in a circuit so that the current flows through each resistor. In this configuration, the total resistance (R) of the circuit is equal to the sum of the individual resistances, also known as the equivalent R.To calculate the total R in a series circuit, the individual resistances of each resistor are added together. The formula to calculate the equivalent resistance in a series connection is Rtotal = R1 + R2 + R3 +

What is the Temperature Coefficient of Resistance?The temperature coefficient of resistancemeasures changes in the electrical resistance of any substance per degree of temperature change.Let us take a conductor having a resistance of R0 at 0oC and Rt at toC, respectively.From the equation of resistance variation with temperature, we getThis αo is called the temperature coefficient of resistance of that substance at 0oC.From the above equation, it is clear that the change in electrical resistance

More than one electrical resistance can be connected either in series or in parallel in addition to that, more than two resistances can also be connected in combination of series and parallel both. Here we will discuss mainly about series and parallel combination.Resistances in SeriesSuppose you have three different types of resistors – R1, R2 and R3– and you connect them end to end as shown in the figure below, then it would be referred as resistances in series. In case of series connection, th

There are some materials mainly metals, such as silver, copper, aluminum, which have plenty of free electrons. Hence this type of materials can conduct current easily that means they are least resistive. But the resistivity of these materials is highly dependable upon their temperature. Generally metals offer more electrical resistance if temperature is increased. On the other hand the resistance offered by a non-metallic substance normally decreases with increase of temperature.If we take a pie

What is Equivalent Resistance?The equivalent resistance is defined as a point where the total resistance is measured in a parallel or series circuit (in either the whole circuit or in a part of the circuit). The equivalent resistance is defined between two terminals or nodes of the network. Equivalent resistance may sound complicated, but it’s just a technical way to say “total resistance”.In the equivalent resistance of a network, a single resistor could substitute the complete network so that

What is Electrical Resistance?Resistance (also known as ohmic resistance or electrical resistance) is a measure of the opposition to current flow in an electrical circuit. Resistance is measured in ohms, symbolized by the Greek letter omega (Ω).The larger resistance, the greater the barrier against the flow of current.When the potential difference is applied to a conductor, the current starts flowing, or the free electrons start moving. While moving, the free electrons collide with the atoms and

Voltage instability is a serious phenomenon that can occur in a power system because of critical or stressed conditions. To prevent voltage collapse caused by such instability, accurate voltage collapse prediction is necessary for power system planning and operation. This paper proposes a novel collapse prediction index (NCPI) to assess the voltage stability conditions of the power system and the critical conditions of lines. The effectiveness and applicability of the proposed index are investi