Static capacitors are rated in terms of?

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asked Mar 20, 2018 by anonymous

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Capacitors for power factor correction are rated in?

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asked Mar 20, 2018 by anonymous

In a distribution system, in order to improve power factor, the synchronous capacitors are installed?

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asked Mar 21, 2018 by anonymous

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asked Mar 20, 2018 by anonymous

Series capacitors on transmission lines are of little use when the load VAR requirement is?

Last answer: Series capacitors on transmission lines are of little use when the load VAR requirement is small.

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asked Mar 15, 2018 by anonymous

What are the different types of capacitors?

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asked Aug 18, 2019 by anonymous

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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asked Mar 20, 2018 by anonymous

Series capacitors are used to?

Last answer: Series capacitors are used to compensate for line inductive reactance.

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asked Mar 8, 2018 by anonymous

Which capacitors are suitable for DC filter circuits?

Last answer: Electrolytic capacitors are suitable for DC filter circuits.

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asked Mar 20, 2018 by anonymous

The capacitors used in single-phase capacitor motors have no?

Last answer: The capacitors used in single-phase capacitor motors have no polarity marking.

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asked May 21, 2020 by anonymous

Explain working of static AC circuit breaker.

Last answer: Static AC Circuit breaker: The circuit configuration of static AC circuit breaker using SCR is shown in the figure. When switch S' is closed, the SCRs T1 and T2 are fired in positive ... non-availability of gate current. Thus the maximum time delay for breaking the circuit is one half-cycle.

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asked Jun 29, 2019 by anonymous

Briefly describe the electric field of a static charge.

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asked Apr 28, 2018 by anonymous

Which of the following statements is not characteristic of a static magnetic field?

Which of the following statements is not characteristic of a static magnetic field? (A) It is solenoidal. (B) It is conservative. (C) It has no sinks or sources. (D) Flux lines are always closed.

Last answer: Which of the following statements is not characteristic of a static magnetic field? (A) It is solenoidal. (B) It is conservative. (C) It has no sinks or sources. (D) Flux lines are always closed.

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12

asked Sep 4, 2018 by anonymous

State any four types of capacitors.

Last answer: Types of capacitors: i) Air capacitor ii) Paper capacitor iii) Mica capacitor iv) Ceramic capacitor v) Electrolytic capacitor vi) Poly-carbon capacitor

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13

asked Apr 27, 2020 by anonymous

Explain dynamic and static induced emf with neat diagram.

Last answer: Dynamically Induced EMF:- In this case, either coil moves or magnet moves, so that there is relative motion between coil & magnetic field. Thus magnetic field is cut by coil & emf is induced in it. The emf ... The expression for induced EMF is e= -L(di/dt) or = -N(dϕ/dt).

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91 views 1 answer

14

asked Jun 29, 2019 by anonymous

List at least two examples that show how static electricity can be generated.

Last answer: Examples of how static electricity can be generated include combing your hair, walking across a carpeted room, or sliding two pieces of plastic across each other.

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asked May 6, 2018 by anonymous

Which RAM is faster static or dynamic?

Last answer: Static RAM are faster than dynamic RAM.

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asked Mar 22, 2018 by anonymous

Dynamic friction as compared to static friction is?

Last answer: Dynamic friction is less compared to static friction.

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17

asked Aug 9, 2017 by anonymous

Static Synchronous Compensator (STATCOM)

Last answer: Static Synchronous Compensator (STATCOM) STATCOM stands for Static Synchronous Compensator or Condenser. It may be a source of reactive power or sink of reactive AC power. It can ... and Controllers etc. STATCOM have symmetric lead-lag capability. STATCOM have no moving part.

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18

asked Apr 19, 2020 by anonymous

Capacitors

Last answer: .embed-container { position: relative; padding-bottom: 56.25%; height: 0; overflow: hidden; max-width: 100%; } .embed-container iframe, .embed-container object, .embed-container embed { position: absolute; top: 0; left: 0; width: 100%; height: 100%; }

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asked Apr 29, 2018 by anonymous

What is the charge on each capacitor when a 150 V is applied across two capacitors with values 5 μF and 10 μF,

What is the charge on each capacitor when a 150 V is applied across two capacitors with values 5 μF and 10 μF, connected in series? A) 500 μC B) 0.5 μC C) 0.5 C D) None of these

Last answer: What is the charge on each capacitor when a 150 V is applied across two capacitors with values 5 μF and 10 μF, connected in series? A) 500 μC B) 0.5 μC C) 0.5 C D) None of these

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20

asked Mar 25, 2018 by anonymous

The circuit has resistors, capacitors and semi-conductor diodes. The circuit will be known as?

The circuit has resistors, capacitors and semi-conductor diodes. The circuit will be known as

Last answer: The circuit has resistors, capacitors and semi-conductor diodes. The circuit will be known as non-linear circuit.

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21

asked Mar 21, 2018 by anonymous

For measurements on high voltage capacitors, the suitable bridge is?

Last answer: For measurements on high voltage capacitors, the suitable bridge is Schering bridge.

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22

asked Apr 11, 2018 by anonymous

In case of a power transformer, the no load current in terms of rated current is

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23

asked Jul 24, 2019 by anonymous

Explain the concept of following terms : (i) Connected load (ii) Maximum demand

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asked Mar 20, 2018 by anonymous

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

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25

asked May 25, 2018 by anonymous

Which of the following capacitors are used in D.C. circuits ?

Which of the following capacitors are used in D.C. circuits ? (a) Mica (b) Air (c) Ceramic (d) Electrolytic

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26

asked May 15, 2018 by anonymous

A battery of 40 V and three capacitors of 1000 μF, 500 μF and 100 μF are all connected in

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Last answer: A battery of 40 V and three capacitors of 1000 μF, 500 μF and 100 μF are all connected in (I) parallel and (II) series. The ratio of total charge stored in case I to that in case II is approximately 104 : 5

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27

asked Sep 2, 2018 by anonymous

Three capacitors 15µf, 18µf and 12µf are connected in a circuit. Find equivalent capacitance when they are connected in – 1) Series 2) Parallel

Last answer: Ans: Value of equivalent capacitance: Given: C1= 15μF, C2=18 µF, C3= 12µF i)For Series combination of capacitors: 1/Cs = (1/C1)+( 1/C2) +(1/C3) = (1/15)+( 1/18)+( 1/12) 1/Cs = 0.0666+0.0555+0. ... Cs = 4.868 µF ii) For parallel combination of capacitors: Cp = C1 + C2 + C3 = 15 +18+ 12 = 45 µF

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28

asked May 29, 2018 by anonymous

How will the total capacitance change, when two capacitors are connected in parallel?

Last answer: The capacitance will increase if connected in parallel because it will be like you have increase surface area of a plate by connecting it to another.

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29

asked Sep 18, 2017 by anonymous

What will happen when capacitors are connected in parallel?

Last answer: The capacity of capacitor is added and it becomes multiple of no of capacitors capacity

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30

asked Aug 17, 2020 by omar

A synchronous generator and motor are rated 30MVA, 13.2 kV, and both have subtransient reactances of 20%. The line connecting them has a reactance of 10% on the base of the machine ratings. The motor is drawing 20MW at 0.8 power-factor leading and a terminal voltage of 12.8 kV when a symmetrical 3-phase fault occurs at the motor terminals. Use superposition concepts to find the fault current in amperes

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31

asked Apr 10, 2018 by anonymous

In a static over-current relay, inverse time characteristics are obtained by

In a static over-current relay, inverse time characteristics are obtained by (a) A differentiating circuit (b) An integrating circuit (c) A transistor amplifier (d) A transistor switch

Last answer: B

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32

asked Mar 31, 2018 by anonymous

In motor circuit static frequency changers are used for __________.

Last answer: In motor circuit static frequency changers are used for speed regulation.

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33

asked Aug 1, 2020 by anonymous

In terms of calories, 20 jamuns and 3 bananas combined are equivalent to one mango and one papaya combined, and 2 mangoes and 5 bananas combined are equivalent to 4 papayas and 80 jamuns combined. Then 8 papayas and 2 mangoes are equivalent to how many bananas?

Last answer: 17

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34

asked Mar 19, 2018 by anonymous

The transformer ratings are usually expressed in terms of?

Last answer: The transformer ratings are usually expressed in terms of kVA.

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209 views 1 answer

35

asked Sep 18, 2017 by anonymous

What are the uses of ceramic capacitors?

Last answer: Uses of ceramic capacitors is as follows :The ceramic capacitor is use in DC to DC converter.The ceramic capacitor is use with band pass and band stop filter.Ceramic capacitor ... The ceramic capacitor is uses in high frequency circuits.Ceramic capacitors are use for biasing applications.

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36

asked Dec 17, 2020 by anonymous

3 lamps rated 240V 60W,240V 75W,240V 100W respectively are connected in series across a 240V supply. Calculate the voltage across each lamp and power output from each lamp.

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37

asked Aug 19, 2019 by anonymous

Why are generators rated in kVA not in kW ?

Last answer: Because It's rating of generator kva is apparent power. Kw is active power which we use. And one is kvar reactive power.

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94 views 3 answers

38

asked Mar 31, 2018 by anonymous

Two heaters, rated at 1000 W, 250 V each are connected in series across...

Two heaters, rated at 1000 W, 250 V each are connected in series across a 250 V, 50 Hz ac mains. The total power drawn from the supply would be __________ watt.

Last answer: Two heaters, rated at 1000 W, 250 V each are connected in series across a 250 V, 50 Hz ac mains. The total power drawn from the supply would be 500 watt.

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39

asked Mar 29, 2018 by anonymous

The storage batteries are rated in

Last answer: The storage batteries are rated in Amp-hrs

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asked Mar 28, 2018 by anonymous

Rheostats are usually rated in

Last answer: Rheostats are usually rated in Watts and Amperes.

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41

asked Jun 17, 2018 by anonymous

Which of the following are the basic elements in a 555 timer IC?

Which of the following are the basic elements in a 555 timer IC? (a) Two comparators (b) A flip-flop (c) A discharge transistor (d) A resistive voltage divider A) (a), (b) and (d) B) only (a), (b) and (c) C) only (b), (c) and (d) D) only (a), (b), (c) and (d)

Last answer: Which of the following are the basic elements in a 555 timer IC? (a) Two comparators (b) A flip-flop (c) A discharge transistor (d) A resistive voltage divider A) (a), (b) and (d) B) only (a), (b) and (c) C) only (b), (c) and (d) D) only (a), (b), (c) and (d)

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42

asked Mar 20, 2018 by anonymous

Depreciation charges are high in case of?

Last answer: Depreciation charges are high in case of thermal plant.

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43

asked May 13, 2018 by anonymous

The terms 'soft sectored' and 'hard sectored' are used in connection with

The terms 'soft sectored' and 'hard sectored' are used in connection with 1. μP 2. RAM 3. ROM 4. Floppy disk

Last answer: The terms 'soft sectored' and 'hard sectored' are used in connection with Floppy disk

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44

asked Mar 27, 2018 by anonymous

Static error co-efficients are used as a measure of the effectiveness of...

Static error co-efficients are used as a measure of the effectiveness of closed loop systems for specified ________ input signal.

Last answer: acceleration , velocity, position

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82 views 1 answer

45

asked Jul 24, 2019 by anonymous

Why concentrating collectors are used in solar power plant.

Last answer: Because of following advantages concentrating type collector are used in solar power plant: - 1. Temperature: Temperature obtained is high because absorber area is less and collector/reflector area ... results: As tracking system is used better results are obtain than flat type collector.

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46

asked Mar 20, 2018 by anonymous

In Hopknison demand rate or two part tariff the demand rate or fixed charges are?

Last answer: In Hopknison demand rate or two part tariff the demand rate or fixed charges are dependent upon the maximum demand of the consumer.

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58 views 1 answer

47

asked May 24, 2018 by anonymous

Two generating stations G1 and G2 of ratings 10 MVA and 8 MVA respectively are linked by a line rated at 5

Two generating stations G1 and G2 of ratings 10 MVA and 8 MVA respectively are linked by a line rated at 5 MVA, 0.1 Pu reactance. Each station has a reactance of 0.5 pu. If the base MVA is 10 MVA, short-circuit MVA of G1 is

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353 views 0 answers

48

asked May 16, 2018 by anonymous

Modern capacitors which have high capacitance in small size use a dielectric of

Modern capacitors which have high capacitance in small size use a dielectric of (A) paper (B) rubber (C) ceramic (D) Mylar

Last answer: Modern capacitors which have high capacitance in small size use a dielectric of ceramic

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75 views 1 answer

49

asked May 15, 2018 by anonymous

Equivalent capacitance ‘C’ of a system of capacitors C1,C2,C3 connected in parallel is

Last answer: Equivalent capacitance ‘C’ of a system of capacitors C1,C2,C3 connected in parallel is C = C1+C2+C3

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50

Static capacitors are rated in terms of?

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