Description : What type of PN diode is formed by using a fine metal wire and a section of N-type semiconductor material?
Last Answer : Point-contact.
Description : What is the purpose of the rectifier section?
Last Answer : To change ac to pulsating dc.
Description : Conduction in which type of semiconductor material is similar to conduction in a copper wire?
Last Answer : N-type material.
Description : What is the name given to a piece of pure semiconductor material that has an equal number of electrons and holes?
Last Answer : Intrinsic.
Description : What is the name of the simplest type of rectifier which uses one diode?
Last Answer : The half-wave rectifier.
Description : What type of flowchart is constructed by the programmer to represent the sequence of operations the computer is to perform to solve a specific problem?
Last Answer : A programming flowchart.
Description : What are the majority carriers in a P-type semiconductor?
Last Answer : Holes.
Description : What are the majority carriers in an N-type semiconductor?
Last Answer : Electrons.
Description : The domain in a gallium-arsenide semiconductor has what type of electrical field when compared to the other regions across the body of a semiconductor?
Last Answer : A field of much greater intensity.
Description : What is the purpose of the rectifier in a magnetic amplifier?
Last Answer : The rectifier eliminates hysteresis loss.
Description : If a half-wave rectifier is added to a half-wave voltage doubler, the resulting circuit is a voltage ___
Last Answer : Trippler.
Description : Is a full-wave rectifier output easier to filter than that of a half-wave rectifier?
Last Answer : Yes.
Description : What main advantage does a bridge rectifier have over a conventional full-wave rectifier?
Last Answer : The bridge rectifier can produce twice the voltage with the same size transformer.
Description : What is the main disadvantage of a conventional full-wave rectifier?
Last Answer : Peak voltage is half that of the half-wave rectifier.
Description : What is the average voltage (Eavg) Output of a full-wave rectifier with an output of 100 volts peak?
Last Answer : 63.7 volts.
Description : What is the ripple frequency of a full-wave rectifier with an input frequency of 60 Hz?
Last Answer : 120 hertz.
Description : What was the major factor that led to the development of the full-wave rectifier?
Last Answer : The fact that the full-wave rectifier uses the full output, both half cycles, of the transformer.
Description : If the output of a half-wave rectifier is 50-volts peak, what is the average voltage
Last Answer : 15.9 volts.
Description : What is the output of a half-wave rectifier?
Last Answer : A pulsating dc voltage.
Last Answer : The bridge rectifier can produce double the voltage with the same size transformer.
Description : What is the main disadvantage of the conventional full wave rectifier?
Last Answer : The peak voltage is half that of a half-wave rectifier.
Description : What is the average voltage (Eavg) output of a full-wave rectifier that has an output of 100 volts peak?
Last Answer : 63.6 volts.
Description : What is the equation for determining average voltage in a half-wave rectifier?
Last Answer : Eavg = 0.318 × Emax
Description : What is the Ripple frequency of a half-wave rectifier if the input frequency is 60 Hz?
Last Answer : 60 hertz.
Description : For a diode to act as a rectifier, should it be connected in series or parallel with the load?
Last Answer : Series.
Description : Does a rectifier tube conduct on the positive or negative alternation of the input signal?
Last Answer : Positive.
Description : List three meter movements that can measure either ac or dc without the use of a rectifier.
Last Answer : Electrodynamic, moving vane, and hot-wire or thermocouple.
Description : What is the purpose of a rectifier in a meter?
Last Answer : A rectifier changes alternating current to pulsating direct current and allows a dc meter to measure ac.
Description : How may R-S FFs be constructed?
Last Answer : By cross-coupling NAND or OR gates.
Description : The way a magnetic head will be used determines how it is constructed. Name three factors that determine the final construction of a magnetic head.
Last Answer : a. Type of head (record, reproduce, or erase). b. Frequencies it will record or reproduce. c. Whether it will be used on a single or multitrack recorder.
Description : List four system topologies that can be constructed using point-to-point fiber optic links.
Last Answer : Linear bus, ring, star, and tree topologies.
Description : To maintain the required balance of phase relationships and critical feeding, how must the end-fire array be constructed?
Last Answer : Symmetrically.
Description : Name the two types of current flow in a semiconductor.
Last Answer : Electron flow and hole flow.
Description : What are the two most common semiconductor materials used in electronic and electro-optic devices?
Last Answer : Silicon and gallium arsenide.
Description : What is the name given to the semiconductor device that has three or more elements?
Last Answer : Transistor
Description : What semiconductor device produces electrical energy when exposed to light?
Last Answer : Photovoltaic cell.
Description : What does the letter "N" indicate in the semiconductor identification system?
Last Answer : A semiconductor.
Description : State one requirement of an electron tube, which does not exist for semiconductors, that makes the tube less efficient than the semiconductor.
Last Answer : The electron tube requires filament or heater voltage, whereas the semiconductor device does not; consequently, no power input is spent by the semiconductor for conduction.
Description : What is lowest current at which stimulated emission exceeds spontaneous emission in a semiconductor laser called?
Last Answer : Threshold current.
Description : Which semiconductor sources (LD or LED) emit more focused light and are capable of launching sufficient optical power into both single mode and multimode fibers?
Last Answer : LDs.
Description : Semiconductor LEDs emit incoherent light. Define incoherent light
Last Answer : Light waves that lack a fixed-phase relationship
Description : What are the four most common materials used in semiconductor detector fabrication?
Last Answer : Silicon, gallium arsenide, germanium, and indium phosphide.
Description : What characteristic of a gunn oscillator is inversely proportional to the transit time of the domain across the semiconductor?
Last Answer : The frequency.
Description : The point on the current curve of a gallium-arsenide semiconductor at which it begins to exhibit negative resistance is called what?
Last Answer : Threshold.
Description : What happens to the electrons of a gallium-arsenide semiconductor when they move from the normal low-energy conduction band to the high-energy conduction band?
Last Answer : The electrons become immobile.
Description : What is another name for semiconductor memory chips?
Last Answer : Integrated circuits.
Description : A semiconductor memory consists of what?
Last Answer : hundreds of thousands of tiny electronic circuits etched on a silicon chip
Description : What characteristic of a transistor is varied in a semiconductor-reactance modulator?
Last Answer : Collector-to-emitter capacitance.