1 is the maximum value of power factor.

Answer : Power plant having maximum demand more than the installed rated capacity will have utilisation factor more than unity. ...

Answer : For high value of diversity factor, a power station of given installed capacity will be in a position to supply more number of consumers. ...

Define : i) Maximum Value ii) RMS Value of ac supply Answer : i) Maximum Value :- The maximum or peak value attained by an alternating quantity during positive or negative half cycle, is called maximum value or peak value. ii) RMS Value of ac supply :- The effective or RMS value of an alternating current is that value of the steady current or DC current...

Answer : In a power plant if the maximum demand on the plant is equal to the plant capacity, then plant reserve capacity will be zero. ...

Answer : Maximum demand on a power plant is the greatest of all "short time interval averaged" demand during a period. ...

Answer : An induction motor has relatively high power factor at near full load. ...

Answer : In a distribution system, in order to improve power factor, the synchronous capacitors are installed at the receiving end. ...

Answer : For a consumer the most economical power factor is generally 0.95 lagging . ...

Answer : The primary reason for low power factor is supply system is due to installation of induction motors. ...

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

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

Can a synchronous condenser improve power factor? Answer : Yes, synchronous condenser can improve power factor. ...

Power station having Load factor = 70%, capacity factor = 50%, used factor = 60%, maximum demand = 2 Answer : Power station having Load factor = 70%, capacity factor = 50%, used factor = 60%, maximum demand = 20MW then annual energy production is 122.8 GWh ...

What is the value of capacitance required to improve power factor from 0.7 to 0.9. Given that: Re Answer : To determine the value of capacitance required to improve the power factor from 0.7 to 0.9, we need to follow a systematic approach. Here is a step-by-step outline of the process: 1. **Calculate the initial reactive power (Q1)**: \[ Q_1 = P \cdot \tan(\cos^{-1}(\text{PF}_1)) \] where \(...

Maximum Power Transfer Theorem 1 Answer : Maximum Power Transfer Theorem 1...

State maximum power transfer theorem for DC circuit. Answer : Maximum power transfer theorem for DC circuit: The maximum power transfer theorem states that the source or a network transfers maximum power to load only when the load resistance is equal to the internal resistance of the source or the network. The internal resistance of the network is the Theveni...

An independent voltage source in series with an impedance ZS=R+jXS delivers a maximum average power Answer : An independent voltage source in series with an impedance ZS=R+jXS delivers a maximum average power to a load impedance ZL when ZL = R-jXS ...

A certain power MOSFET has a maximum junction temperature specification of 1500o C, a junction-to- Answer : A certain power MOSFET has a maximum junction temperature specification of 1500o C, a junction-to-case thermal resistance of 1.00 C/W, and a junction-to ambient thermal resistance of 600 C/W. If the ambient temperature is 300o C, then the maximum allowable power dissipation in the d...

The maximum reluctance power of a salient-pole synchronous motor having direct-axis reactance, 1.0 p Answer : The maximum reluctance power of a salient-pole synchronous motor having direct-axis reactance, 1.0 pu and quadrature-axis reactance, 0.5 pu, and input voltage, 1.0 pu is 0.5 pu ...

For maximum transfer of power, internal resistance of the source should be? Answer : For maximum transfer of power, internal resistance of the source should be equal to load resistance. ...

"Maximum power output is obtained from a network when the load resistance is equal to the out Answer : "Maximum power output is obtained from a network when the load resistance is equal to the output resistance of the network as seen from the terminals of the load". The above statement is associated with Maximum power transfer theorem. ...

Answer : The mechanical power developed by a shunt motor will be maximum when the ratio of back e.m.f. to applied voltage is 0.5. ...

Answer : In a D.C. shunt motor, under the conditions of maximum power, the current in the armature will be more than full-load current. ...

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

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

Answer : The value of starting capacitor of a fractional horse power motor will be 300 uF . ...

What is the value of Beta in power BJT? Answer : The beta value in power BJT is 5 to 10....

State the effects of low power factor on efficiency and voltage regulation of short transmission lin 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 efficiency reduces. ii) Effect of Low power factor on voltage Regulation:- When power factor of load red...

Briefly explain how the power factor of an inductive circuit can be improved. 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 normal 220v supply. Pf in an inductive circuit is corrected by connecting a capacitor in the circuit so as to ma...

Why capacitors are used to improve power factor? 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....

Discuss how power factor tariff results into energy conservation. Answer : Power factor tariff results into energy conservation: i) Applying incentives and penalties according to power factor is an effective way, which enables consumer to improve power factor so that he can reduce his higher electricity bill. ii) Incentive is given to those consumers who are charged on th...

Draw and explain bulk correction method for power factor & control. Answer : Bulk correction method for power factor & control: i) Here individual starter controls the capacitors located at distribution panel. ii) Centralized compensation is employed in large industrial plants where many motors are in use at a time. iii) Capacitors racks are installed at the incoming di...

State the incentives and penalties related with power factor tariff. Answer : Incentives and penalties related with power factor tariff: In addition to basic tariff (Maximum Demand Tariff / KVA Maximum Demand Tariff / Load factor tariff) the tariff in which P.F. of industrial consumer is taken into consideration is known as Power Factor Tariff. If the P.F. of consumer is le...

With a neat sketch explain working of 1 phase dynamometer type power factor meter. Answer : Working of 1 phase dynamometer type power factor meter : The current coil is connected in series with load. Two pressure coils marked as A and B are connected across the supply terminals and take current IA and IB respectively. The current IA is in phase with supply voltage V as its circuit is resi...

State the significance of power factor. Answer : Significance of power factor:- 1. Cosine of angle between voltage & current in a circuit is called power factor. 2. It is a measure of the real power in a circuit. 3. Inductive & capacitive circuits causes low PF. Low PF causes increase in current resulting in increase in copper losses i...

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

The power factor of dielectric : (A) is a function of temperature of the dielectric only (B) depen Answer : The power factor of dielectric : (A) is a function of temperature of the dielectric only (B) depends only on voltage stress to which the dielectric is stressed (C) always constant (D) both (A) and (B) ...

In a synchronous generator delivering lagging power factor load (1) the excitation emf leads termi Answer : In a synchronous generator delivering lagging power factor load the excitation emf leads terminal voltage by the power angle ...

What is the power factor when a single phase watt meter operating on 200 V and 5 A for 5 hours makes Answer : What is the power factor when a single phase watt meter operating on 200 V and 5 A for 5 hours makes 2016 revolutions and the meter constant in revolution is 420? A) 0.04 B) 1.04 C) 0.96 D) None of these ...

The benefit of power factor correction in a power system is (A) lower power consumption (B) increa Answer : The benefit of power factor correction in a power system is lower power consumption ...

The power factor angle and torque angle of a salient pole synchronous generator drawing a current Answer : The power factor angle and torque angle of a salient pole synchronous generator drawing a current of 1.0 pu from a lagging load are 45o and 15o, respectively. The direct axis and quadrature axis currents, respectively, are 0.866 pu, 0.5 pu ...

The power factor of a D.C. circuit is always? Answer : The power factor of a D.C. circuit is always unity. ...

The ratio of active power to apparent power is known as____ factor. Answer : The ratio of active power to apparent power is known as power factor. ...

The input of an A.C. circuit having power factor of 0.8 lagging is 40 kVA The power drawn by the c Answer : The input of an A.C. circuit having power factor of 0.8 lagging is 40 kVA The power drawn by the circuit is 32 kW. ...

Power factor of electric bulb is? Answer : Power factor of electric bulb is unity. ...

The power factor at resonance in R-L- C parallel circuit is? Answer : since a rlc circuit at resonance behaves like a pure resistive circuit, i.e there is no phase difference between current and voltage, hence the power factor is unity....

Power factor of the system is kept high? Answer : Power factor of the system is kept high to reduce line losses, to maximise the utilization of the capacities of generators, lines and transformers, to reduce voltage regulation of the line. ...

Power factor of an inductive circuit is usually improved by connecting capacitor to it in? Answer : Power factor of an inductive circuit is usually improved by connecting capacitor to it in parallel. ...

Capacitors for power factor correction are rated in? Answer : Capacitors for power factor correction are rated in kVAR. ...

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