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Diversity factor has direct effect on the fixed cost of unit generated.

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Answer :

In an interconnected system, the diversity factor of the whole system increases.

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Description :

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.

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Description :

The following formula is correct:  (A) Diversity factor =1 / Coincidence Factor  (B) Diversity factor =1 x Coincidence Factor  (C) Diversity factor =1 - Coincidence Factor  (D) All of the above

Answer :

The following formula is correct:  (A) Diversity factor =1 / Coincidence Factor  (B) Diversity factor =1 x Coincidence Factor  (C) Diversity factor =1 - Coincidence Factor  (D) All of the above

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Description :

The knowledge of diversity factor helps in computing  (1) Plant capacity (2) Average load (3) Units (kWh) generated (4) Peak demand

Answer :

The knowledge of diversity factor helps in computing Plant capacity

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Answer :

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

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68 views 1 answer
Description :

Compare RC coupled, transformer coupled and direct coupled amplifier based on four points.

Answer :

Parameter RC coupled Transformer coupled Direct coupled  Coupling element Resistor and capacitor Transformer No element Impedance matching Poor Excellent good Frequency ... Low frequency amplifier,opamp Size and cost small Large and bulky least

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Description :

Differentiate between direct and indirect extrusion. Discuss their relative merits and demerits. 

Answer :

Direct extrusion Indirect extrusion Simple, but the material must slide along the chamber wall. In this case, material does not move but die moves. High friction forces must ... be used for extruding long extrudes. Support of the ram becomes a problem as work length increases.

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48 views 1 answer
Description :

Identify direct addressing instructions from following instructions : (i) MOV RO, R5 (ii) MOV RO, 80 H (iii) MOV RO, #75H (iv) ADD A, 45 H

Answer :

Instructions ii) and iv) are direct addressing as 80H and 45H are direct addresses

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63 views 1 answer
Description :

Direct Extrusion process

Answer :

Direct Extrusion process Direct extrusion process is shown in fig. The raw material used is a billet. It consists of a press operated ram and a cylinder or container into which the heated ... for extruding long extrudes. 2) Support of the ram becomes a problem as work length increases.

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39 views 1 answer
Description :

Direct Current (DC) Next Topic : Alternating current (AC)

Answer :

Direct Current (DC) is the unidirectional electric current. Uni meaning is one. And the flow of charge in same direction. We know that conventional current flow from positive terminal of battery to ... The magnitude of DC may constant or vary but direction do not change with respect to time.

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Description :

advantages and disadvantages of direct coupled amplifier over RC coupled amplifier. 

Answer :

Advantages:  Due to absence of coupling capacitors, the gain does not reduce on the lower frequency side.  This amplifier can amplify dc signals. Reduced cost and complexity due to absence of ...   The output waveform has a dc shift.  Poor frequency response at a higher frequency.

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394 views 1 answer
Description :

Describe the difference between direct and alternating current.

Answer :

Direct current is the flow of electricity or charge in one direction..  Alternative current is the flow of charge that doesn't flow in one direction. 

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5.2k views 4 answers
Description :

Explain with schematic diagram direct distribution of solar energy.

Answer :

Explain with schematic diagram direct distribution of solar energy: Solar energy reaching earth's surface consists of two components: i) Direct solar energy, ii) Diffused solar energy. Direct solar energy ... radiation. It is very intense radiation and it can produce sun burns and shadows.

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99 views 1 answer
Description :

With neat diagram explain calibration of energy meter by direct loading method.

Answer :

Calibration of Energy Meter by Direct Loading Method:  There are three methods for testing/calibration:  1. Long period dial test  2. Using rotary sub- standard meter  3. Using precision grade instruments  All ... of substandard meter in kWh  Then % error = [(D - DS)/DS] x 100

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Description :

State the need of cascade amplifier and draw circuit diagram of 2-stage direct coupled amplifier.

Answer :

Need:- The voltage (or power) gain, obtained from a single stage small signal amplifier, is limited. Therefore, it is not sufficient for all practical applications. Therefore, in order to obtain greater voltage and power gain, cascade amplifiers are used.

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456 views 1 answer
Description :

When the firing angle a of a single-phase, fully controlled rectifier feeding constant direct current into a load is 30°, the displacement power factor of the rectifier is

Answer :

When the firing angle a of a single-phase, fully controlled rectifier feeding constant direct current into a load is 30°, the displacement power factor of the rectifier is √3/2

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Description :

In the case of direct current?

Answer :

In the case of direct current magnitude and direction of current remains constant.

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Description :

Inductance affects the direct current flow?

Answer :

Inductance affects the direct current flow at the time of turning on and off.

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Description :

Answer :

A direct current can be measured by a D.C. potentiometer in conjunction with a standard resistance.

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Answer :

A direct online starter is used for starting motors up to 5 H.P.

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Description :

Answer :

For the protection of power station buildings against direct strokes the requirements are interception, conduction and dissipation.

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Description :

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

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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Description :

Answer :

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

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121 views 1 answer
Description :

Answer :

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

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Description :

Answer :

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

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Description :

Answer :

A low utilization factor for a plant indicates that plant is used for stand by purpose.

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157 views 1 answer
Description :

Answer :

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

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Description :

Answer :

Peak load plant can never have 100 percent load factor.

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Description :

Answer :

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

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Description :

Answer :

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

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Answer :

Demand factor is defined as maximum demand/connected load.

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Answer :

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

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Answer :

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

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Description :

Answer :

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

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Description :

Can a synchronous condenser improve power factor?

Answer :

Yes, synchronous condenser can improve power factor.

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Description :

What is the maximum value of power factor?

Answer :

1 is the maximum value of power factor.

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Description :

Analyze the effect of supply voltage on performance of LED as regards current, Lumen output, efficacy and life. 

Answer :

1) Effect on Current:- In LED current depends upon supply voltage, if voltage get changes then current also change but this change in current will be control by resistors which are connected in series.  2) ...   4) Effect on Life:- If supply voltage is not stable then life of LED get reduced. 

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Description :

With the help of N-channel JFET describe the effect of input voltage VGS on output current ID.

Answer :

Working of N channel FET: * When a voltage is applied between the drain and source with a DC supply (VDD), the electrons flows from source to drain through narrow channel ... where the channel gets completely blocked and the drain current becomes zero is called pinch- off voltage. 

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66 views 1 answer
Description :

The effect of negative feedback on distortion and bandwidth is A) Both distortion and bandwidth get decreased B) Both distortion and bandwidth get increased C) Distortion is reduced and bandwidth is increased D) Distortion is increased and bandwidth is decreased 

Answer :

The effect of negative feedback on distortion and bandwidth is Distortion is reduced and bandwidth is increased

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96 views 1 answer
Description :

The effect of increasing load on a synchronous motor running with normal excitation is (A) Increase both its Ia and power factor. (B) Decrease Ia, but increase power factor. (C) Increase Ia, but decrease power factor (D) Decrease both Ia and power factor.

Answer :

The effect of increasing load on a synchronous motor running with normal excitation is Increase Ia, but decrease power factor

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Description :

Answer :

Effect of a force on a body depends upon magnitude, direction, position or line of action.

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125 views 1 answer
Description :

Piezo-electric effect

Answer :

Piezoelectric Effect is the ability of certain materials to generate an electric charge in response to applied mechanical stress. The word Piezoelectric is derived from the Greek piezein, which means to squeeze or ... Storage Temperature Range: -55 to + 125°C Insulation Resistance: 500 M ohms

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45 views 1 answer
Description :

 State the disadvantages of skin effect.

Answer :

Disadvantages of skin effect:- 1. Full cross section of conductor is not utilized, Therefore effective area of conductor reduces so its resistance increases. 2. Due to increase in resistance, copper ... increases (Since Voltage drop = IR ) 5. So voltage regulation becomes poor (increases) 

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43 views 1 answer
Description :

State the meaning of ferranti effect and proximity effect.  

Answer :

i) Ferranti effect : When long distance transmission is lightly loaded or there is no load condition than it is observe that receiving end voltage (VR) is found to be greater than sending end ... on conductor causes current in each conductor is re-distributed. This is known as proximity effect.

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Description :

State the meaning of skin effect and how can it be minimised. 

Answer :

Meaning of skin effect :  When alternating current flows through conductor it has tendency to flow away from center of conductor. i.e. maximum current density is near skin of conductor and goes on ... whenever possible as Skin effect is absent (Since frequency 0) instead of A.C. supply.  

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Description :

Define armature reaction in an alternator. Explain the effect of armature reaction at various P.F. of loads of alternator.

Answer :

Armature Reaction: The effect of armature flux on main flux is called as armature reaction.  Armature Reaction at Various Power Factors: When armature is loaded, the armature flux modifies ... lagging p.f. For capacitive loads the effect of flux is partly distorting and partly strengthening.

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199 views 1 answer
Description :

List out factors affecting proximity effect. 

Answer :

Factors affecting proximity effect: 1. Conductor size (diameter of conductor) 2. Frequency of supply current. 3. Distance between conductors. 4. Permeability of conductor material 

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48 views 1 answer
Description :

Under Following conditions Ferranti effect occurs: 

Answer :

Under Following conditions Ferranti effect occurs:  1. When there is no load on transmission line (IL = 0) 2. When There is no load at receiving sub-station or Lightly loaded 3. When ... VR) is found to be greater than sending end voltage (VS). This phenomenon is known as Ferranti effect.

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50 views 1 answer
Description :

Explain in brief ‘Hall effect sensor’. 

Answer :

Working: * Working principle of a Hall effect sensor is that if strip of conducting material carries a current in presence of transverse magnetic field as shown fig . * The difference of ... with Hall strip. * When a transverse magnetic field passes through the strip, the voltage difference 

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