Description : What is the term used to refer to the losses which can be traced to the dielectric of a capacitor?
Last Answer : Power losses.
Description : What are the three types of line losses associated with transmission lines?
Last Answer : Copper, dielectric, and radiation.
Description : What types of losses cause the dielectric material between the conductors to be heated?
Last Answer : Dielectric losses.
Description : Name the three power losses in a transformer
Last Answer : Copper-loss, eddy-current loss, and hysteresis loss
Description : Losses caused by skin effect and the I2R (power) loss are classified as what type of loss?
Last Answer : Copper losses.
Description : How much power is needed to supply the losses associated with the production of the magnetic field in a 3-phase motor?
Last Answer : You need to conduct No load and full load losses tests todetermine the losses.
Description : Scattering losses are caused by the interaction of light with density fluctuations within a fiber. What are the two scattering mechanisms called when the size of the density fluctuations is (a) greater than and (b) less than one-tenth of the operating wavelength?
Last Answer : . (a) Mie scattering; (b) Rayleigh scattering.
Description : What is the most likely cause of losses in waveguide systems?
Last Answer : Improperly connected joints or damaged inner surface.
Description : In fiber-to-fiber connections, Fresnel reflection is one source of coupling losses. Light is reflected back into the source fiber and is lost. What causes Fresnel reflection?
Last Answer : A step change in refractive index that occurs at fiber joints, caused by fiber separation.
Description : Fiber-to-fiber coupling loss is affected by intrinsic and extrinsic coupling losses. Can intrinsic coupling losses be limited by limiting fiber mismatches?
Last Answer : Yes.
Description : How are source-to-fiber coupling and microbending and macrobending losses affected by changes in core diameter and D?
Last Answer : Coupling efficiency increases with both core diameter and D, while bending losses increase directly with core diameter and inversely with D.
Description : How is fiber sensitivity to bending losses reduced?
Last Answer : Fiber sensitivity to bending losses can be reduced if the refractive index of the core is increased and/or if the overall diameter of the fiber increases.
Description : What causes copper losses?
Last Answer : Resistance in the armature coils, which increases with temperature
Description : What are the two main disadvantages of an LC capacitor filter?
Last Answer : Cost and size of the inductor.
Description : . What are the two main disadvantages of an LC capacitor filter?
Last Answer : Cost of the inductor and size of the inductor.
Description : What is the relative length of the time constant for the diode capacitor combination in a damper (long or short)?
Last Answer : Short time constant.
Description : How does a capacitor and an inductor react to (a) low frequency and (b) high frequency?
Last Answer : At low-frequency, a capacitor acts as an open and an inductor acts as a short. At high-frequency, a capacitor acts as a short and an inductor acts as an open.
Description : What is the term for the number of times per second that tank circuit energy is either stored in the inductor or capacitor?
Last Answer : Natural frequency or resonant frequency (f r).
Description : When the capacitor is completely discharged, where is the energy of the tank circuit stored?
Last Answer : Inductor magnetic field
Description : If the inductor and capacitor values are increased, what happens to the resonant frequency?
Last Answer : Decreases.
Description : In an a.c. circuit that contains both an inductor and a capacitor, what term is used for the difference between the individual reactances?
Last Answer : Resultant reactance.
Description : What is the purpose of the synchro capacitor?
Last Answer : To improve overall synchro system accuracy by reducing stator currents.
Description : What determines the rate of discharge of the capacitor in a filter circuit?
Last Answer : Value of capacitance and load resistance.
Description : In a capacitor filter, is the capacitor in series or in parallel with the load?
Last Answer : Parallel.
Description : If you increase the value of the capacitor, will the XC increase or decrease? Why?
Last Answer : It will decrease. Capacitance is inversely proportional to:
Description : In an LC choke-input filter, what prevents the rapid charging of the capacitor?
Last Answer : The CEMF of the inductor
Last Answer : Counter electro-motive force of the inductor.
Description : . What determines the rate of discharge of the capacitor in a filter circuit?
Last Answer : Value of capacitance and load resistance
Description : In a capacitor filter, is the capacitor in series or parallel with the load?
Description : If you increase the value of the capacitor will the XC increase or decrease? Why?
Last Answer : Decrease-Capacitance is inversely proportional to XC.
Description : In a circuit using grid-leak biasing, the coupling capacitor (Cc) chargcharge path?
Last Answer : rkg, the cathode to grid resistance.
Description : What is the term for the opposition that a capacitor presents to ac?
Last Answer : Capacitive reactance.
Description : What effect does the capacitor have on a changing voltage?
Last Answer : The capacitor opposes any change in voltage.
Description : What is the discharge rate for the capacitor in a pcm converter?
Last Answer : It will discharge to one-half its value between pulses.
Description : What is the time constant of the resistor and capacitor in a peak detector for pam?
Last Answer : At least 10 times the interpulse period.
Description : A circuit is to be designed in which a capacitor must charge to 40 percent of the maximum charging voltage in 200 microseconds. The resistor to be used has a resistance of 40,000 ohms. What size capacitor must be used?
Last Answer : 0.1 microfarads 40% from the graph = 0.5
Description : What is the RC time constant of a series RC circuit that contains a 12-megohm resistor and a 12-microfarad capacitor?
Last Answer : 144 seconds (t=R x C)
Description : What is the voltage drop across the resistor in an RC charging circuit when the charge on the capacitor is equal to the battery voltage?
Last Answer : Zero.
Description : At what instant does the greatest voltage appear across the resistor in a series RC circuit when the capacitor is charging?
Last Answer : At the instant of the initiation of the action.
Description : state what happens to the electrons in a capacitor circuit when (a) the capacitor is charging and (b) the capacitor is discharging.
Last Answer : a. When the capacitor is charging, electrons accumulate on the negative plate and leave the positive plate until the charge on the capacitor is equal to the battery voltage. b. When the ... the negatively charged plate to the positively charged plate until the charge on each plate is neutral.
Description : a. Define the term "working voltage" of a capacitor. b. What should be the working voltage of a capacitor in a circuit that is operating at 600 volts?
Last Answer : a. It is the maximum voltage the capacitor can work without risk of damage. b. 900 volts.
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 : What are the basic parts of a capacitor?
Last Answer : Two pieces of conducting material separated by an insulator.
Description : Is there any data on costs/losses associated with non payers in the health care system?
Last Answer : In the medical literature there are lots of articles that try to quantify the cost associated with non payers in the US health care system. Unfortunately it comes down to interpretation of statistics ... sense of other peoples statistics. Anyhoo have a look at this article from Health Affairs 2008.
Description : Which of the following advantages is not associated with the use of preheated air for combustion of a fuel in the furnace? (A) Increase in calorific value of the fuel (B) Increase in flame temperature (C) Reduction in scale losses (D) Saving in fuel consumption
Last Answer : (A) Increase in calorific value of the fuel
Description : What are the types of power losses in inductor?
Last Answer : Copper losses, Eddy current loss, and hysteresis loss are the types of power losses in inductor.
Description : Which two composite fields (composed of E and H fields) are associated with every antenna?
Last Answer : Induction field and radiation field.
Description : Stereoscopic-zoom microscopes and precision drill presses are normally associated with what type of repair station?
Last Answer : Microminiature repair station.