Contents
How do you calculate resistance load?
Use Ohm’s Law to determine the total resistance. The following formula is used to determine the total resistance in a circuit when both current and voltage are known: R = V / I, where R = Resistance, V = Voltage, and I = Current.
How do you find the resistance of an inductor?
The opposition of an inductor to a change in current is expressed as a type of AC resistance. I=VXL I = V X L , where V is the rms voltage across the inductor.
How do you calculate inductive reactance?
The formula for calculating the inductive reactance of a coil is: inductive reactance, or XL, is the product of 2 times p (pi), or 6.28, the frequency of the ac current, in hertz, and the inductance of the coil, in henries. XL =2p x f x L.
What is minimum load resistance?
The minimum load is usually the highest resistance that draws the least current from the supply. When the minimum load conditions are not met, the power supply may experience some instability such as flickering and shutdowns. The minimum load for resistive load can be calculated if the minimum current is known.
Does an inductor have resistance?
The resistance of an ideal inductor is zero. The reactance of an ideal inductor, and therefore its impedance, is positive for all frequency and inductance values. The effective impedance (absolute value) of an inductor is dependent of the frequency and for ideal inductors always increases with frequency.
What is difference between resistance and inductance?
It could be said that electrical resistance is the opposition to steady electric current. Impedance is the measure of the nature of opposition of the AC electricity which is created due to inductance and capacitance. This opposition varies with the frequency.
What is the formula for capacitive reactance?
The formula for calculating the Capacitive Reactance, or impedance of a capacitor is: Capacitive reactance, denoted as x sub c (XC), is equal to the constant one million (or 106) divided by the product of 2p ( or 6.28) times frequency times the capacitance .
What is the formula for parallel resistance?
The sum of the currents through each path is equal to the total current that flows from the source. You can find total resistance in a Parallel circuit with the following formula: 1/Rt = 1/R1 + 1/R2 + 1/R3 +… If one of the parallel paths is broken, current will continue to flow in all the other paths.
How to calculate power in an inductive load?
As in inductive load we will have two types of power consumption. one is real power due to resistive component and other one will be reactive power due to inductive components. so in this case we will find the total power as P= Preal + Preactive.
How are inductive reactance and resistance measured in ohms?
This means that the inductive reactance and resistance each need to be squared, added and then the resultant square root taken: The resultant combination of resistance and inductive reactance is referred to as impedance and this is again measured in ohms.
When do you need to calculate inductive reactance?
When using and designing circuits that contain inductors it is often necessary to look at the inductive reactance, calculate it using the formulas above and then add this to a pure resistance to gain the overall impedance. As such these formulas are particularly useful. Return to Basic Electronics Concepts menu . . .
What is the difference between resistive and inductive loads?
With a purely resistive load the current and voltage changes polarity in step and the power factor will be 1. Electrical energy flows in a single direction across the network in each cycle. Inductive loads – transformers, motors and wound coils – consumes reactive power with current waveform lagging the voltage.