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Description : Capacitors for power factor correction are rated in?

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

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

Answer : The desirable static characteristics of a measuring system are accuracy, sensitivity and reproducibility.

Description : 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.

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

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

Description : What are the different types of capacitors?

Description : Which capacitors are suitable for DC filter circuits?

Answer : Electrolytic capacitors are suitable for DC filter circuits.

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

Description : Explain working of static AC circuit breaker. 

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.

Description : Explain dynamic and static induced emf with neat diagram.

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).

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

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.

Description : Briefly describe the electric field of a static charge.

Description : Which RAM is faster static or dynamic?

Answer : Static RAM are faster than dynamic RAM.

Description : 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.

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.

Description : Dynamic friction as compared to static friction is?

Answer : Dynamic  friction  is   less  compared  to  static  friction.

Description : Static Synchronous Compensator (STATCOM)

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.

Description : Capacitors

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%; }

Description : State any four types of capacitors.

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

Description : 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

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

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

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

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

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

Description : In case of a power transformer, the no load current in terms of rated current is (1) 10-20% (2) 15-30% (3) 2-6% (4) 30-50% 

Answer : 1. Connected Load: It is the sum of load of all equipment's connected to supply system which are in use or not in use of each consumer. OR   The sum of connected load of all consumers ... is the maximum load which a consumer uses at a particular time period out of his total connected load. 

Description : Capacitors and inductors are commonly used in circuits. Capacitors store electrical energy in the electric field between their plates. How do inductors store energy?

Answer : ANSWER: IN A MAGNETIC FIELD SURROUNDING THE INDUCTOR 

Description : Three capacitors with different capacitances are connected in series. Which of the following statements is TRUE? w) All three of the capacitors have the same potential difference between their plates. x ... y) The capacitance of the system depends on the voltage applied across the three capacitors.

Answer : ANSWER: X -- THE MAGNITUDE OF THE CHARGE IS THE SAME ON ALL OF THE CAPACITOR PLATES

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

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 

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

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.

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

Description : 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  (a) 3 : 64 (b) 64 : 3 (c) 160 : 3 (d) 104 : 5

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

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

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.

Description : Why are generators rated in kVA not in kW ?

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

Description : 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.

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.

Answer : The storage batteries are rated in Amp-hrs

Answer : Rheostats are usually rated in Watts and Amperes.

Description : 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

Description : In addition to three Central problem of economy, the additional problem(s) raised by the Modern economists is / are (a) Are the resources fully utilized or not ; (b) How efficient is the production and ... (c) Whether the capacity to produce or grow is increasing or is static ; (d) All the three

Answer : (d) All the three

Description : In analog mass communication, stories are (A) static (B) dynamic (C) interactive (D) exploratory

Answer : Answer: A Analog mass communication is the one way process of transferring message to the receiver, or audience. Here the audience is large so they utilize analog media which was originally used in audio ... to the count it was recreating. Here the contents can be only linear and static not dynamic

Description : 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

Answer : B

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

Description : Which of the following is a characteristic of Web2.90 applications? (A) Multiple users schedule their time to use Web2.0 applications one by one. (B) Web2.0 applications are focused on the ... content rather than facilitating users to create it. (D) Web2.0 applications use only static pages.

Answer : (B) Web2.0 applications are focused on the ability for people to collaborate and share information online.

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

Answer : acceleration , velocity, position 

Description : The effective capacitance of four, 5-microfarad capacitors connected in series is: w) 0.20 microfarad x) 0.5 microfarad y) 1.0 microfarad z) 1.25 microfarad

Answer : ANSWER: Z -- 1.25 MICROFARAD

Description : A 10 farad capacitor is used in a circuit. The voltage difference between the plates of the capacitor is 20 volts. What is the magnitude of the charge on each of the capacitor's plates?

Answer : ANSWER: 200 COULOMBS

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

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

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

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

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