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What are the problems with switching AC currents in a circuit of pure resistance at unity power factor?
Power factor does not apply to a resistive circuit. Just the current will follow the voltage (in phase)
Compare the phase relationship between the voltage and current in a purely resistive circuit and an RL circuit?
In a pure resistive circuit the voltage and current are in phase. In an inductive circuit they are fro zero to 180 degrees out of phase. If they are in phase the Power Factor is 1 and 180 degrees the PF is zero. The exact amount of the phase difference depends on the specific circuit.
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.
How do you assumed power factor?
Power Factor is a maximum of one when the voltage and current in an AC waveform are in phase. Since power in watts is equal to voltage x current x power factor, you get maximum wattage with power factor = 1. This occurs with a pure resistive load. When you power an inductive load like a motor the power factor decreases and so does the delivered power. That is why motors are typically rated in VA, or volt-amperes rather than watts. So y Ou can assume power factor = 1 when you have a load measured in watts like a light bulb or space heater and perhaps in the .75 range for an inefficient motor.
What is the Difference between resistive and capacitive load?
when a resistive load is applied there is no phase angle difference between voltage and current. when a inductive load is applied there is phase difference between voltage and current. current lags voltage by an angle of 90 degrees for pure inductive load
What are the problems with switching AC currents in a circuit of pure resistance at unity power factor?
Power factor does not apply to a resistive circuit. Just the current will follow the voltage (in phase)
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.
What is the nature of power factor and its variation with firing angle when a single phase voltage controller feeds a resistive load?
With a pure resistive load the Power Factor should be 1.
What is the approximative power factor of an incandescent lamp?
Incandescent lamps are nearly pure resistive loads with a power factor of 1
Compare the phase relationship between the voltage and current in a purely resistive circuit and an RL circuit?
In a pure resistive circuit the voltage and current are in phase. In an inductive circuit they are fro zero to 180 degrees out of phase. If they are in phase the Power Factor is 1 and 180 degrees the PF is zero. The exact amount of the phase difference depends on the specific circuit.
What areVolt ohm ampere and watts associated with?
Volts = current (In amps) x Resistance (In ohms) Watts = Volts x Current x PowerFactor Power Factor = 1 in a pure resistive circuit
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.
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.
Can a furnace operate on a power factor of 0.2?
If a furnace has a power factor not equal to 1 then there is a motor involved. If it was pure resistive element the Power Factor would be 1. That being said the motor can operate at .2 PF, but this is unusual and not very efficient. If this is the case I would expect that you have a bad motor control circuit and there may be a blown capacitor.
How many watts in 1500VA?
Watts = Volts x Amps x Power Factor. To answer your question requires that the Power Factor be know. The Power Factor ranges from zero to one and is one for a pure resistive load. If your device is resistive the answer is 1500 watts.
What is the wattage required for a device drawing 35 amps?
Watts = Volts x Amps x Power Factor To make your calculation you need to plug-in the Voltage and Power factor. The Power Factor is a value from zero to one with one being a pure resistive load.
What is a purely resistive circuit?
It does not contain unidirectional outputAnswerA purely resistive circuit is an 'ideal' circuit that contains resistance, but not inductance or capacitance.
