Description : What effect does an increase in capacitance have on a capacitor’s opposition to current flow?
Last Answer : Opposition to current flow decreases.
Description : In the schematic of the electrical circuit shown in the illustration, what is the value of the total capacitance, when compared to the value of equal individual capacitors? EL-0038 A. Equal B. Half C. Double D. Squared
Last Answer : Answer: C
Description : what will be the capacitance if three capacitors connected in parallel each having value of 0.5 micro Farad ?
Last Answer : the total capacitace when connected in parallel Tc=total capacitor c1=c2=c3=0.5uf Tc=c1+c2+c3 Tc=1.5uf
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.
Last 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
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
Description : Alternating current circuits develop resistance, inductance, and capacitance. The capacitance of individual capacitors is expressed in _____________. A. ohms B. mhos C. henrys D. farads
Last Answer : Answer: D
Description : Combined capacitance is equal to the A. sum of all capacitance of capacitors B. product of all the capacitance C. difference between the capacitors D. average capacitance of capacitors
Last Answer : sum of all capacitance of capacitors
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
Last Answer : ANSWER: Z -- 1.25 MICROFARAD
Description : 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.
Description : 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
Description : 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
Description : . What are two of the three physical factors that determine the values of capacitance and inductance of a transmission line?
Last Answer : (1) Type of line used, (2) dielectric in the line, and (3) length of line.
Description : State three factors that affect the capacitance of a capacitor.
Last Answer : a. The area of the plates. b. The distance between the plates. c. The dielectric constant of the material between the plates.
Description : Before working on electrical equipment containing capacitors, what should you do to the capacitors?
Last Answer : Discharge them by shorting them to ground.
Description : What tool is used to de-energize capacitors in a circuit that has been disconnected from its power source?
Last Answer : Shorting probe.
Description : Why are synchro capacitors placed physically close to differentials transmitters and CTs?
Last Answer : To keep the connections as short as possible in order to maintain system.
Description : How are synchro capacitors connected in a circuit?
Last Answer : They are delta-connected across the stator windings.
Description : What type of current is eliminated by synchro capacitors?
Last Answer : Magnetizing current.
Description : What type of synchros usually require the use of synchro capacitors?
Last Answer : TDXs, CDXs, and Cts.
Description : In a full-wave voltage doubler, are the capacitors connected in series or in parallel with the output load?
Last Answer : In parallel.
Description : Why is the use of large value capacitors in filter circuits discouraged?
Last Answer : Expense
Description : Which oscillator uses tapped capacitors for feedback?
Last Answer : Colpitts.
Description : Charged capacitors can kill. True or false?
Last Answer : True.
Description : Identical dielectric slabs are inserted into two identical capacitors `A` and `B`. These capacitors and a battery are connected as shown in figure. No
Last Answer : Identical dielectric slabs are inserted into two identical capacitors `A` and `B`. These capacitors ... , which fully appears as heat in the circuit
Description : When replacing component 'B' of the circuit shown in the illustration, it is important to know that ____________. EL-0081 A. it is polarity sensitive and must be inserted as indicated on its ... provide the capacitor's initial charge D. it must match the circuit voltage and component 'C' wattage
Description : Which of the devices listed is indicated by the symbols lettered 'A' to 'F', shown in the illustration? EL-0016 A. Diodes B. Linear inductors C. Capacitors D. Transistors
Last Answer : Answer: A
Description : As shown in the illustration, 'H1' and 'H2' are ___________. EL-0058 A. fixed capacitors B. variable capacitors C. contacts, closed when the circuit is energized D. contacts, open when the circuit is energized
Description : When changing out component 'B' of the circuit shown in the illustration, it is important to know that ____________. EL-0081 A. it is polarity sensitive and must be inserted as indicated on its ... provide the capacitor's initial charge D. it must match the circuit voltage and component 'C' wattage
Description : . After rewinding a tape onto its supply reel, you examine the tape pack and notice pile-ups of tape resembling the example in figure 2-2. What causes this condition?
Last Answer : The tape is stopped too quickly when winding or rewinding.
Description : With the inputs shown below, what will be the output of S1, S2, and C2?
Last Answer : MSD of the sum.
Description : The waveforms shown below are the input and output of an overdrive
Last Answer : a. Cutoff. b. Saturation.
Description : What type of feedback is usually caused by the base-to collector interelectrode capacitance?
Last Answer : Degenerative or negative
Description : What type of feedback is usually caused by interelectrode capacitance?
Last Answer : Negative (degenerative) feedback
Description : When an unknown capacitance is tested with a bridge, what is the value of Cx if R1 equals 70 ohms, R2 equals 150 ohms, and Cs equals 550 microfarads?
Last Answer : 256 microfarads.
Description : When the reverse bias on a varactor is increased, what happens to the effective capacitance?
Last Answer : Capacitance decreases.
Description : A transmission line is said to have distributed constants of inductance, capacitance, and resistance along the line. What units of measurement are used to express these constants?
Last Answer : Inductance is expressed in micro henrys per unit length, capacitance is expressed in picofarads per unit length, and resistance is expressed in ohms per unit length.
Description : Trade-offs between competing effects are necessary for high speed response. Which competing effect (fast transit time, low capacitance, or high quantum efficiency) requires a thin active area?
Last Answer : Fast transit time.
Description : Should the capacitance of the photodetector be kept small or large to prevent the RC time constant from limiting the response time?
Last Answer : Small
Description : Moving tube electrodes apart to decrease interelectrode capacitance causes an increase in the effect of what property?
Last Answer : Transit time
Description : What happens to the impedance of interelectrode capacitance as frequency increases?
Last Answer : Impedance decreases.
Description : How does the addition of a screen grid in a tetrode reduce interelectrode capacitance?
Last Answer : The interelectrode capacitance (cpg) is divided between two series capacitances; thus, cpg is greatly reduced.
Description : What happens to the value of XC as capacitance increases
Last Answer : XC decreases.
Description : Examine the given diagrammatic view of human skull given below and identify the skull bones labelled from A-D.
Last Answer : Examine the given diagrammatic view of human skull given below and identify the skull bones labelled ... (" Temporal Parietal Mandible Maxilla "):}`
Description : The exercise of due professional care requires that an auditor a. Critically review the judgment exercised at every level of supervision. b. Attain the proper balance of professional experience ... education. c. Reduce control risk below the maximum. d. Examine all available corroborating evidence
Last Answer : Critically review the judgment exercised at every level of supervision.
Description : Examine the figures (A-D) given below and select the right option out of (a – d), in which all the four structures A, B, C and D are identified correctly. A B D
Last Answer : C
Description : . If the power distribution system shown in figure 2-22 uses selective tripping, what is the time delay rating for each of the circuit breakers shown?
Last Answer : CB1-long time delay; CB2, CB3-short time delay; CB4 through
Description : What type of frequency meter is shown and what is the value indicated for each meter in figure 1-52?
Last Answer : A) Vibrating-reed, 60Hz. (B) Moving-disk, 58 Hz.
Description : What type of meter is shown and what is the value of the quantity being measured for each meter in figure 1-51?
Last Answer : (A) Megger (megohmmeter), infinity; (B) Wattmeter, 9.5 kilowatts (9,500 watts). (C) Watt-hour meter, 2.693 megawatt-hours 2,693 kilowatt-hours) (2,693,000 watt-hours).