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What is the power factor of pure resistor?

Updated: 8/20/2019
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Q: What is the power factor of pure resistor?
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What is power factor of resistor?

A resistor doesn't have a power factor. However, if a circuit is pure resistance in nature the power factor will be one when a voltage is applied and a current flows in the circuit. The power factor is a measure of the relative phases of the current and voltage in a circuit.


Why does the resistor current stay the same when you adjust the power factor?

A pure resistive load always has a power factor of one. This is because the current and voltage waveforms are in phase in an AC circuit.


How is the power factor of an Electrodynamometer type wattmeter improved?

Power Factor of an electrodynamometer can be improved by connecting a large resistor in series with the current coil.


What is the approximative power factor of an incandescent lamp?

Incandescent lamps are nearly pure resistive loads with a power factor of 1


Power factor for pure resistive circuit?

ratio between true power and apparent power is called the power factor for a circuit Power factor =true power/apparent power also we conclude PF=power dissipated / actual power in pure resistive circuit if total resistance is made zero power factor will be zero


How do you decide the pachage size of resistor with same value of resistance?

The package size roughly equates to wattage- the amount of power a resistor can safety dissipate without damage. Use your basic ohms law to figure out how much power will be dissipated by the resistor, and use the next largest size. A good safety factor is 2, so if you calculate the power is 1/4 watt, use a 1/2 watt resistor. One other factor is duty cycle. A component with a low duty cycle would need less of a safety factor, or perhaps could be sized according to the AVERAGE power in the resistor.


Is pure inductor consumes energy?

Pure inductors consume and produce power, just like other reactive devices. The difference is that the current is not in phase with the voltage, resulting in the waveform of the power being oscillating about zero, with a net mean power of zero. In this "pure" case, the power factor is zero, but that does not mean there is no power - its just that the power "reading" is unsophisticated and not compensating for power factor.


What is the value of power factor for a pure capacitor?

0. Power factor has to do with the amount of real power. if you have a purely capacitive load, there is no real power flow, thus pf = 0. For purely resistive load, power factor will be 1.0.


What method improve power factor?

The most common method of improving the power factor of a load is to connected a capacitor or capacitor bank, of appropriate reactive power (expressed in reactive volt amperes), in parallel with the load.


What is the power factor in pure inductors explain?

The power factor (cosine of phase angle) of pure inductor is zero because the phase angle between current and voltage is 90 degrees .If the value is substituted in the formula It will be zero.


What is the function of a cement resistor?

A cement resistor is typically used as a power resistor (a resistor whose power rating is greater than 1 W).


How do you find power generated in a resistor?

The power generated in a resistor is converted into heat. and that can be power which is converted into heat is the product of the voltage across the resistor and, current passing through the resistor. or the product of square of the current and the resistance offered by the resistor.