# Minimum voltage regulation occurs when the power factor of the load is?

Minimum voltage regulation occurs when the power factor of the load is?

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## 1 Answer

### Answer :

Minimum voltage regulation occurs when the power factor of the load is leading.

## Related Questions

A transformer has negative voltage regulation when its load power factor is   (1) Zero (2) Unity (3) Leading (4) Lagging
Last Answer : 0

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5.1k views 3 answers

Negative voltage regulation is indicative that the load is?
Last Answer : Negative voltage regulation is indicative that the load is capacitive.

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229 views 1 answer

A zener voltage regulator has load requirements of 12 V and 2 A. The zener diode minimum current requirement is 0.2 A. The minimum voltage at input is 24 V. What is the required value of series resistance with source? A) 5.45 Ω B) 6 Ω C) 7.2 Ω D) 6.38 Ω
Last Answer : A zener voltage regulator has load requirements of 12 V and 2 A. The zener diode minimum current requirement is 0.2 A. The minimum voltage at input is 24 V. What is the required value of series resistance with source? A) 5.45 Ω B) 6 Ω C) 7.2 Ω D) 6.38 Ω

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2.7k views 1 answer

A good voltage regulation of a transformer means?
Last Answer : A good voltage regulation of a transformer means output voltage fluctuation from no load to full load is least.

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Power station having Load factor = 70%, capacity factor = 50%, used factor = 60%, maximum demand = 20MW then annual energy production is  (1) 122.8 GWh (2) 198.55 GWh (3) 128.2 GWh (4) 188.82 GWh
Last Answer : Power station having Load factor = 70%, capacity factor = 50%, used factor = 60%, maximum demand = 20MW then annual energy production is 122.8 GWh

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148 views 1 answer

In a synchronous generator delivering lagging power factor load  (1) the excitation emf leads terminal voltage by the power angle (2) the excitation emf lags terminal voltage by the power angle (3) ... by the power factor angle (4) excitation emf lags the terminal voltage by the power factor angle
Last Answer : In a synchronous generator delivering lagging power factor load the excitation emf leads terminal voltage by the power angle

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340 views 1 answer

Last Answer : The power factor of a single phase load can be calculated if the instruments available are three ammeters or three voltmeters.

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296 views 2 answers

Last Answer : Load factor of a power station is generally less than unity.

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107 views 1 answer

Last Answer : Load factor of a power station is defined as average load/maximum demand.

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321 views 1 answer

If the load of the normally excited synchronous motor is increased the power factor will?
Last Answer : If the load of the normally excited synchronous motor is increased the power factor will become lagging.

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150 views 1 answer

The synchronous motor which works on leading power factor and does not drive any mechanical load is called?
Last Answer : The synchronous motor which works on leading power factor and does not drive any mechanical load is called synchronous condenser.

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162 views 1 answer

Define load and line regulation.
Last Answer : 1. Load regulation : The load regulation indicates how much the load voltage changes when the load current changes. The load regulation is defined as:  % Load regulation = (VNL-VFL) / VFL *100  ... the power supply. A well-regulated power supply can have a line regulation of less than 0.1%.

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101 views 1 answer

Identify the increasing order of voltage regulation of the following dc generators a same load :  (A) differential compound, shunt and under compound  (B) shunt, differential compound and ... C) under compound, shunt and differential compound  (D) shunt, under compound and differential compound
Last Answer : Identify the increasing order of voltage regulation of the following dc generators a same load : under compound, shunt and differential compound

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123 views 1 answer

In an alternator at lagging power factor the generated voltage per phase as compared to that at unity power factor?
Last Answer : In an alternator, at lagging power factor the generated voltage per phase as compared to that at unity power factor must be more than terminal voltage.

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524 views 1 answer

An SSB transmitter produces a peak-to-peak voltage of 200 V across a 100 Ω antenna load. What is the Peak Envelope Power? A) 49.98 W B) 79.98 W C) 99.96 W D) 199.93 W
Last Answer : An SSB transmitter produces a peak-to-peak voltage of 200 V across a 100 Ω antenna load. What is the Peak Envelope Power? A) 49.98 W B) 79.98 W C) 99.96 W D) 199.93 W

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294 views 1 answer

Last Answer : The voltage regulation in magnetic amplifier type voltage regulator is effected by varying the reactance.

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106 views 1 answer

what is the minimum voltage required to turn on a diode ?
Last Answer : 0.7 v sil and 0.3 v for gr

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157 views 1 answer

In a given transformer for a given applied voltage, losses which remain constant irrespective of load changes are?
Last Answer : In a given transformer for a given applied voltage, losses which remain constant irrespective of load changes are hysteresis and eddy current losses.

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152 views 1 answer

Classify hydro-electric power plants according to water flow regulation and explain in brief.
Last Answer : Classification of hydro-electric power plants according to water flow regulation of water flow:-  1. Large reservoir power plant 2. Run-off river (ROR) power plant with poundage 3. Run-off River ... depends upon rate of flow of water Initial cost is less Its purpose is to generate electricity.

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83 views 1 answer

State the effects of low power factor on efficiency and voltage regulation of short transmission lines.
Last Answer : i) Effect of Low power factor on efficiency:- When power factor of load reduces current drawn by transmission line increases so copper losses in transmission line increases, hence transmission ... increases, so voltage drop in transmission line increases so regulation increases. (Become Poor)

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357 views 1 answer

For optimum generator scheduling for different power plants, the minimum fuel cost is obtained when
Last Answer : For optimum generator scheduling for different power plants, the minimum fuel cost is obtained when The incremental fuel cost of each plant multiplied by the penalty factor is the same

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93 views 1 answer

The maximum load that a power transformer can carry is limited by its?
Last Answer : The maximum load that a power transformer can carry is limited by its voltage ratio.

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133 views 1 answer

Load factor is the  (1) Ratio of maximum load on the station to sum of consumer's maximum load.  (2) Ratio of average demand to maximum demand.  (3) Factor used for increasing load.  (4) Reciprocal of (1).
Last Answer : Load factor is the Ratio of average demand to maximum demand.

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101 views 1 answer

The load duration curve for unity load factor will be of  (1) Rectangular shape (2) Triangular shape (3) L -shape (4) I -shape
Last Answer : The load duration curve for unity load factor will be of Rectangular shape

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1.5k views 1 answer

In order to have a lower cost of electrical energy generation the load factor  (1) and the diversity factor should be low (2) should be low but the diversity factor should be high (3) should be high but the diversity factor should be low (4) and the diversity factor both should be high
Last Answer : In order to have a lower cost of electrical energy generation the load factor and the diversity factor both should be high

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134 views 1 answer

Last Answer : Peak load plant can never have 100 percent load factor.

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143 views 1 answer

Last Answer : In two part tariff, variation in load factor will affect operating or running charges.

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79 views 1 answer

Last Answer : High load factor indicates total plant capacity is utilised for most of the time.

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101 views 1 answer

Last Answer : The load factor of domestic load is usually 10 to 15%.

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151 views 1 answer

Last Answer : A transformer can have regulation closer to zero on leading power factor.

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140 views 1 answer

A ferro resonant transformer regulation is also known as?
Last Answer : A ferro resonant transformer regulation is also known as constant current transformer.

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95 views 1 answer

A 3-phase voltage source inverter operates in 180° conduction mode with a star connected resistive load. If input dc voltage is 100 V, then the peak to peak output line voltage is :
Last Answer : A 3-phase voltage source inverter operates in 180° conduction mode with a star connected resistive load. If input dc voltage is 100 V, then the peak to peak output line voltage is : 200 V

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205 views 1 answer

Last Answer : In a level compounded D.C. generator, full load terminal voltage is equal to no-load terminal voltage.

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129 views 1 answer

Last Answer : In over compounded generator, full load terminal voltage is more than no load terminal voltage.

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114 views 1 answer

Last Answer : The standard full-load power factor ratings for synchronous motors are unity or 0.8 leading.

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98 views 1 answer

Define line regulation and load regulation.
Last Answer : Load regulation is the ability of the power supply to maintain its specified output voltage over changes in the load. Line regulation is the ability of the power supply to maintain its specified output voltage over changes in the input line voltage.

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325 views 3 answers

The following formula is correct:  (A) Load factor=Average load for a period/ Peak load for the same period  (B) Load factor=Average load for a period x Peak load for the same period  (C) Load factor=Average load for a period + Peak load for the same period  (D) All of the above
Last Answer : The following formula is correct: (A) Load factor=Average load for a period/ Peak load for the same period (B) Load factor=Average load for a period x Peak load for the same period (C) Load factor=Average load for a period + Peak load for the same period (D) All of the above

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67 views 1 answer

The maximum constant load torque under which a synchronous motor will pull into synchronism at rated rotor supply voltage and frequency is known as?
Last Answer : The maximum constant load torque under which a synchronous motor will pull into synchronism at rated rotor supply voltage and frequency is known as pull-in torque.

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302 views 1 answer

State why nuclear power plants are used as base load plants and diesel power plants as a peak load plant.
Last Answer : 1. Because of following points Nuclear power plant used as base load power plant:-  1. Nuclear power plants is very economical for producing bulk amount of electric power 2. Nuclear power plant is reliable ... . The plants can be put on load easily. 4. Diesel engines take less time to make OFF.

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120 views 1 answer

Generally in a power system network, the load is represented as a :  (A) Constant power in both load flow study and in stability study  (B) Constant power in load flow study and constant ... impedance in load flow study  (D) Constant impedance in both load flow study and in stability study
Last Answer : Generally in a power system network, the load is represented as a : Constant power in load flow study and constant impedance in stability study

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118 views 1 answer

In tuned power lines, on load :  (A) the receiving end voltage is numerically equal to the sending end voltage  (B) the receiving end current is numerically equal to the sending end current  (C) there is no voltage drop  (D) all the above
Last Answer : In tuned power lines, on load :  (A) the receiving end voltage is numerically equal to the sending end voltage  (B) the receiving end current is numerically equal to the sending end current  (C) there is no voltage drop  (D) all the above

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79 views 1 answer

Load compensation in power systems is a process to :  (A) Maintain better voltage profile (B) Increase short circuit capacity of the system (C) Generate required harmonics for loads like arc furnaces (D) Compensate for the line reactance
Last Answer : Load compensation in power systems is a process to : Maintain better voltage profile

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110 views 1 answer

A 3 -phase, fully controlled, converter is feeding power into a DC load at a constant current of 150 A, the rms value of the current flowing through each thyristor of the converter is
Last Answer : Please show the solution for this question

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515 views 2 answers

The power consumed by a balanced 3-ph load is measured by two-wattmeter method. The meter readings are 8 kW and 4 kW. The power factor of the load is (A) zero (B) 0.5 (C) between zero and 0.5 (D) between 0.5 and unity
Last Answer : The power consumed by a balanced 3-ph load is measured by two-wattmeter method. The meter readings are 8 kW and 4 kW. The power factor of the load is between 0.5 and unity

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171 views 1 answer

The synchronous motor will develop maximum power when the load angle is?
Last Answer : The synchronous motor will develop maximum power when the load angle is 900.

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223 views 1 answer

What is base load and peak load power plants?

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65 views 0 answers

What is meant by Power factor?
Last Answer : Ans. Power factor means ratio of true power to apparent power. It is cosine of phase angle between voltage and current. Its value is 1 for Unity P.F. Loads, 0 to 1 lagging for inductive loads and o to 1 leading for capacitive loads.

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17 views 1 answer

Briefly explain how the power factor of an inductive circuit can be improved.
Last Answer : As we know that power factor should be corrected to ensure that the current supplied is cost friendly. Meaning the power factor should be around one but not greater than one(0.8-0.9) in a ... an inductive circuit due to the inductive reactance which oppose the change of current in the ac circuit.

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182 views 1 answer

What is the value of capacitance required to improve power factor from 0.7 to 0.9. Given that: Real power = 50 W Vrms of the source = 120 Frequency = 50 Hz   #powerfactor

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197 views 0 answers

Why capacitors are used to improve power factor?
Last Answer :  Capacitors generate reactive power instead of that drawn from source which is required by inductive loads.so it reduce the reactive current which is drawn from source to be drawn from capacitor.This control in Electric bills cost.

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183 views 3 answers