What is the effect of resistance and reactance on power factor ?

1 Answer

Answer :

Power factor depends on resistance and reactance. As the resistance of the circuit increases, the phase angle between the current and the voltage decreases, resulting in an increase in the power factor. As the reactance of the circuit increases, the phase angle between the current and the voltage increases, resulting in a decrease in the power factor of the circuit.

Related questions

Description : What is the expression of capacitive reactance ?

Last Answer : Capacitive reactance = XC

Description : What is the effect of resistance , inductance and capacitance in transmission line ?

Last Answer : These 3 factors create voltage drop and power loss of the line. The inductive reactance creates a voltage drop across the line and the capacitance creates a charging current.

Description : What effect does increased heat loss have on resistance ?

Last Answer : As the heat decreases, the resistance decreases. Note: In the case of semiconductors, the resistance increases as the heat decreases. As the heat increases, the resistance increases.

Description : A series combination of resistance 100 ohm and capacitance 50µf is connected in series to a 230 V, 50HZ supply. Calculate (i) Capacitive reactance (ii) Current (iii) Power factor (iv) Power consumed 

Last Answer : For RC series circuit

Description : What is the relationship between power and resistance ?

Last Answer : Power , resistance to P , relation to R : Proportional when P = I ^ 2 * R again disproportionate when P = V ^ 2 / R

Description : What is the best economic power factor ?

Last Answer : This means that raising the power factor results in maximum annual savings , in which case the value of the power factor is called the best saving power factor.

Description : What happens if the value of power factor is low ?

Last Answer : ( a) Current flows more , ( b) Copper loss increases , ( c) Heat increases , ( d) Output decreases , ( e) Voltage drop increases , ( f) Different electrical machinery heats up quickly. , ( G) The life span of various electrical machinery and appliances is reduced.

Description : What is the Leading Power Factor ?

Last Answer : When the capacitive load of an AC circuit exceeds the inductive load , the pf of the circuit is called the leading pf . Thank you!

Description : What is Lagging Power Factor ?

Last Answer : When the inductive load of an AC circuit exceeds the capacitive load , the pf of the circuit is called lagging pf .

Description : What is Unity Power Factor ?

Last Answer : There is no angular gap between current and voltage in pure resistance. That is, the phase angle of current and voltage is φ = 0, the power factor of that circuit is one or unit. This is called Unity Power Factor.

Description : What is the leading power factor ?

Last Answer : When the amount of capacitive load is more than the inductive load in a circuit then the power factor of that circuit is called leading power factor.

Description : What is lagging power factor ?

Last Answer : When the amount of inductive load is greater than the capacitive load in a circuit then the power factor of that circuit is called lagging power factor.

Description : What is the power factor in pure resistive , capacitive , inductive load ?

Last Answer : Answer : Power factor cosΦ = 1 in pure resistive load, cosΦ = 0 in capacitive load , cosΦ = 0 in inductive load .

Description : How many types of power factor ?

Last Answer : Three types , namely , 1) lagging power factor , 2) leading power factor , 3) unity power

Description : What is lagging power factor ?

Last Answer : The cosine value of the phase angle between current and voltage in an inductive circuit is called lagging power factor.

Description : What is Power Factor ?

Last Answer : The phase factor or the cosine value of the angular interval between the voltage and current of an AC circuit is called the power factor.

Description : When is the power factor lagging , leading , unity ?

Last Answer : Power factor lagging in inductive load. Power factor leading in capacitive load is power factor unity in resistive load.

Description : What is a Power Factor Meter ?

Last Answer : The cosine angle between voltage and current is called power factor

Description : What is the value of power factor ?

Last Answer : The value of power factor is Cos Theta

Description : What is the power factor expressed by ?

Last Answer : The power factor is expressed by cos theta.

Description : What is Leading Power Factor ?

Last Answer : If the current in the AC circuit is ahead of the voltage, it is called leading power factor.

Description : Three factors responsible for the change in voltage as load is applied to an AC generator are: 1) the drop in resistance in the armature circuit, 2) the change in flux, and 3) the ____________. A. armature winding speed B. inductance load drop C. coil pitch factor D. armature reactance voltage drop

Last Answer : Answer: D

Description : When a megohmmeter is used to test insulation, the gradual rise of the pointer reading as a result of continued cranking, is caused by _____________. A. good conductor resistance B. the ... insulation C. the inductive reactance of the windings D. the dielectric-absorption effect of the insulation

Last Answer : Answer: D

Description : The combined effect of inductive reactance, capacitive reactance, and resistance in an AC series circuit is known as _____________. A. reactance B. total reactance C. impedance D. resonance

Last Answer : Answer: C

Description : What is Effective Resistance ?

Last Answer : The combined resistance due to ohmic resistance , skin effect , eddy current loss , die-electric caused by any conductor in AC circuit is called effective resistance.

Description : What is Ohmic Resistance ?

Last Answer : The ohmic resistance is the resistance of a conductive DC current.

Description : What is effective resistance ?

Last Answer : Answer : The combined resistance of a conductor in an AC circuit due to ohmic resistance , skin effect , eddy current , hysteresis and dielectric loss is called effective resistance.

Description : What is the heat coefficient of resistance ?

Last Answer : Answer : The coefficient of heat is the amount of radh that increases with the increase in temperature per ohm of radh.

Description : What is resistance ?

Last Answer : Resistance is the nature of the conductor for which the flow of electricity through it is interrupted.

Description : What is the expression of relative resistance ?

Last Answer : Relative resistance is expressed by Wm .

Description : What is the resistance of the conductor ?

Last Answer : : Conduction resistance depends on the area and length of the cross section of the conductive material.

Description : What is the relative resistance of copper ?

Last Answer : Copper relative resistance 4.2x10 ^ -8 Wm .

Description : When does the formula of resistance apply ?

Last Answer : When it is necessary to know the resistance of a conductor, the resistance formula is required.

Description : How many and what are the sources of resistance ?

Last Answer : There are two sources of resistance. In case of class circuit : Rs = R1 + R2 + R3 + In case of parallel circuit : 1 / Rp = 1 / R1 + 1 / R2 + 1 / R3 +

Description : Which substance loses its resistance to temperature rise ?

Last Answer : Increasing the temperature increases the resistance of all conductors. This is because as the temperature increases, the vibrations of the atoms inside the conductor increase. Exceptions: But ... case of carbon and conductive materials, increasing the temperature reduces the conductive resistance.

Description : What do we know from temperature and resistance ?

Last Answer : When electricity is transmitted through a wire, the obstacle is the resistance. In other words , resistance is the obstruction of electrons in the wire . Depending on the temperature. So we know that if the resistance increases, the temperature rises.

Description : What is the source of Ohm's resistance ?

Last Answer : : Current flowing through a conductor at a constant temperature is proportional to the voltage across the two ends of the conductor. Or the current flowing through a conductor at a constant ... to the voltage difference between the two ends of that conductor and disproportionate to the resistance.

Description : What is the multiplying factor of shunt ?

Last Answer : Answer : The ratio of load or matte current to ammeter current is called shunt multiplying power.

Description : What is Diversity Factor ?

Last Answer : Diversity factor is the sum of the individual maximum demand and the ratio of the maximum demand of the plant.

Description : What is capacity factor ?

Last Answer : The ratio between the total power produced at a given time and if the plant is running at full capacity at that time, is called capacity factor.

Description : What is Demand Factor ?

Last Answer : Demand factor is the ratio of the maximum demand of electricity to the connected load.

Description : What is load factor ?

Last Answer : The ratio of average load to maximum load of a power plant or customer is called load factor.

Description : What is the form factor ?

Last Answer : The ratio of the working value to the average value of an AC wave is called the form factor. Its value is 1.11.

Description : What is Fusing Factor ?

Last Answer : : The ratio of minimum fusing current and current rating of fuse of fuse is called fusing factor.

Description : What is Quality Factor ?

Last Answer : Resonant frequency and band thickness ratio is called quality factor.

Description : What is the effect of heat on insulating material ?

Last Answer : With increasing temperature, the resistance of almost all solid insulators except Avro decreases. When the temperature drops again, the resistance increases.

Description : If X is the system reactance and R is its resistance, the power transferred is maximum when (1) X=R (2) X=1.414 R (3) X=1.732 R (4) X=2R 

Last Answer : x = 1.732R

Description : Which of the following statements concerning AC circuits is correct? A. The power factor of a resistive circuit is always zero. B. True power in an inductive circuit always equals apparent power. ... . D. Total opposition to the flow of alternating current depends upon the amount of reactive power.

Last Answer : Answer: C

Description : A three-phase synchronous motor has a terminal voltage of 460 V and a terminal current of 120 A at a power factor of 0.95 lagging, synchronous reactance of 1.68 ohm and the field current is 47 A. The field to armature mutual ... _____________.      (a). 20mH   (b). 16mH   (c). 24mH   (d). 22mH

Last Answer : 22

Description : What are the components of power transmission line ?

Last Answer : ( a) Power Plant , ( b) Conductor Wire , ( c) Transformer , ( d) Line Insulator , ( e) Line Support , ( f) Power Substation , ( g) Circuit Breaker , ( h) Relay , ( I) Isolator , ( j) Lighting Arrester