射频工程师测试题RF Quiz #11. What is the impedance of free space?377ou2. What happens to the noise figure of a receiver when a 10 dB attenuator is added at theinput?a) Noise figure increases by 10 dBb) Noise figure decreases by 10 dBc) Noise figure doesn't change3. An RF system has a linear throughput gain of +10 dB and an output 3rd-order intercept point(OIP3) of +30 dBm. What is the input 3rd-order intercept point(IIP3)? a) +20 dBmb) +40 dBmc) +30 dBm4. Which filter type has the greatest selectivity for a given order(i.e., N=5)? a) Besselb) Chebychev (ripple=0.1 dB)c) Butterworth5. Which mixer spurious product is a 5th-order product?a) 1*LO + 5*RFb) 6*LO - 1*RFc) 3*LO - 2*IF6. A 2.8 GHz oscillator is phase-locked to a 10 MHz reference oscillator that has a single-sidedphase noise of -100 dBc at 1 kHz offset. What is the single-sided phase noise of the 2.8 GHzoscillator at 1 kHz offset?a) -48.6 dBcb) -100 dBcc) -51.1 dBc7. What is the power of a 2 Vpk-pk sine wave across a 50 ohm load? a) -20.0 dBmb) +10.0 dBmc) +19.0 dBm8. Which 2-port S-parameter is commonly referred to as "reverse isolation" in an amplifier? a) S21b) S22c) S129. What are the minimum and maximum combined VSWR limits at an interface characterized bya 1.25:1 VSWR and a 2.00:1 VSWR?a) 1.75:1 (min), 2.25:1 (max)b) 1.60:1 (min), 2.50:1 (max)c) 0.75:1 (min), 3.25:1 (max)10. An ideal directional coupler has a directivity of 25 dB and an isolation of 40 dB. What is itscoupling value? I=D+Ca) 65 dBb) 40 dBc) 15 dBRF Quiz #2 1. On a Smith chart, what does a point in the bottom half of the chart represent? a) An inductive impedanceb) A capacitive impedancec) Power saturation2. While we're on the subject of Smith charts, what is the impedance of the point at the far leftedge of the center horizontal line?a) Infinite ohms (open circuit)b) Zero ohms (short circuit)c) 50 ohm match3. A single-conversion downconverter uses a high-side localoscillator (LO) to translate the inputradio frequency (RF) to an intermediate frequency (IF). Willspectral inversion occur at IF? a) Yes, alwaysb) No, neverc) Sometimes4. What happens to the noise floor of a spectrum analyzer when the input filter resolutionbandwidth is decreased by two decades?a) 20 dB increaseb) 20 dB decreasec) 40 dB decrease5. What is a primary advantage of a quadrature modulator?a) Low LO power requiredb) Four separate outputsc) Single-sideband output6. What is meant by dBi as applied to antennas?a) Isolation in decibelsb) Physical size relative to intrinsic antennasc) Gain relative to an isotropic radiator7. What is the power dynamic range of an ideal 12-bit analog-to-digital converter (ADC)? a) 36.12 dBb) 120 dBc) 72.25 dB8. An ideal 10 dB attenuator is added in front of a load that has a 2.00:1 VSWR. What is theresulting VSWR of the load + attenuator?a) 1.07:1b) 2.10:1c) 12.0:19. What is the thermal noise power in a 1 MHz bandwidth when the system temperature is 15degrees Celsius (assume gain and noise figure are 0 dB)?a) -114.0 dBm (in a 1 MHz bandwidth)b) -114.0 dBmc) -114.0 dBm/Hz10. Two equal amplitude tones have a power of +10 dBm, and generatea pair of equalamplitude 3rd-order intermodulation products at -20 dBm. What is the 2-tone, 3rd-order intercept point (IP3) of the system?a) +40 dBmb) +25 dBmc) +20 dBmRF Quiz #31. What is a primary advantage to using 90 degree (quadrature) hybrid couplers in amplifierdesigns?a) Wider bandwidth possibleb) Low noise figurec) Input/output impedance not dependent on devices as long as device impedances are equal 2. Why is there a frequency term in the equation for free-space path loss?a) There is no frequency termb) Atmospheric absorptionc) Antenna geometry requires it3. If an amplifier has a noise temperature of 60K, what is its noise figure for an ambienttemperature of 290K?a) 8.0 dBb) 80 dBc) 0.82 dB4. What is a primary advantage of offset-quadrature-phase-shift-keying (OQPSK) over standard QPSK?a) Greater data rates possibleb) Greater spectral efficiencyc) More constant envelope power5. A mixer has the following input frequencies: RF = 800 MHz, LO = 870 MHz. The desired output frequency is 70 MHz. What is the image frequency?a) 940 MHzb) 1670 MHzc) 140 MHz6. What is the spurious-free dynamic range of a system with IP3 =+30 dBm and a minimumdiscernible signal (MDS) level of -90 dBm?a) 80 dBb) 120 dBc) 60 dB7. A spectrum analyzer displays a component at 10 MHz @ 0 dBm, 30 MHz @ -10 dBm, 50 MHz@ -14 dBm, 70 MHz @ -17 dBm, and all of the other odd harmonics until they disappear intothe noise. What was the most likely input signal that caused the spectrum? a) A 10 MHz square wave (0 Vdc)b) A 10 MHz triangle wave (0 Vdc)c) A 10 MHz cosine wave (0 Vdc)8. On which side of a rectangular waveguide is an E-bend made? a) The long dimensionb) The short dimensionc) The inside9. During a network analyzer calibration, why are both a short circuit and an open circuit used?a) They average to 50 ohms in an RF systemb) To determine the characteristic impedance of the measurement system c) Both are easy to produce to at high accuracy10. What is the first harmonic of 1 GHz?a) 1 GHzb) 2 GHzc) 10 GHzRF Quiz #4 1. Which of the following can cause frequency intermodulation products in a system? a) Only semiconductor junctionslike diodes and transistors (amplifiers) b) Cable connectors, bolted or riveted antenna panels, isolators and circulators c) Both a) and b)2. What is the melting temperature of standard 60/40, tin/lead solder? a) 100?C (212?F)b) 250?C (482?F)c) 186?C (386?F)3. What is the frequency band for the 900 MHz GSM cellular band? a) Tx: 880-915 MHz / Rx: 925-960 MHzb) Tx: 824-849 MHz / Rx: 869-894 MHzc) There is no 900 MHz GSM band4. What does GSM stand for?a) General System for Mobile phonesb) Greater Spectrum for Mobile phonesc) Global System for Mobile Communication5. What does POTS stand for (in communications)?a) Plain Old Telephone Systemb) PersOnal Telephony Systemc) Personal Orbital & Terrestrial Satellite6. Which of these pairs of materials in the triboelectric series have the greatest charge transfer potential?a) Silk & Woolb) Rubber Balloon & Celluloidc) Glass & Hard Rubber7. Along which side of rectangular waveguide is an "E" bend made?a) Longer sideb) Shorter sidec) "E"ither side8. What is the lowest modulation index at which an FM carrier is suppressed?a) 2.40b) , (3.1416)c) Only AM carriers can be suppressed9. How much current is required through the human body to cause an onset to muscular paralysis during electrocution?a) Voltage is the culprit during electrocution, not currentb) 21 mAc) ? amp10. At what frequency is electromagnetic energy maximally absorbed due to oxygen in the atmosphere?a) 22 GHzb) Only water in the atmosphere absorbs electromagnetic energyc) 63 GHzRF QUIZ #5This quiz tests your recognition of logos from companies* that are leaders in the RF industry. In some cases, part of the standard logo was cropped because it had the company name included. Printing out this page to fill in the blanks is probably the best way to go about this puzzle.Hover your cursor over a logo to see a hint as to what type of product it manufactures., American____________________________Technical _ _ Ceramics (ATC), Piconics____________________________, Channel _ _ Microwave, Marki Microwave ____________________________ , Scientific Atlanta _ _ , Anadigics____________________________, National Instruments _ _, Remec____________________________, Analog Devices _ _ , Datel, Andrew ____________________________ Corporation _ _ , Hittite Microwave ____________________________ , Delta _ _ , Power Cube, Agilent ____________________________ Technologies _ _ , Synergy ____________________________Microwave _ _ , Power One, Cypress ____________________________ Semiconductor _ _ , Connecticut ____________________________Microwave _ _ , Miteq____________________________, Vicor _ _ , NationalSemiconductor ____________________________ , Maury Microwave _ _ , Cinch____________________________, Stanford _ _ Microdevices, Huber+Suhner ____________________________ , Johanson _ _ Dielectrics ____________________________ , Sage Labs _ _ , Ansoft, Atlantic ____________________________Microwave _ _ , Intusoft, Dallas ____________________________Semiconductor _ _ , MerrimacIndustries ____________________________, Applied Radio _ _ Labs, Texas ____________________________ Instruments _ _ , Trilithic, Rohde & Schwarz, Voltronics, GeneralMicrowave , Dielectric Laboratories, RF Micro Devices, GHz Technology _____________________________ _RF Quiz #6:Wireless Communications Fundamentals1. Which of the following WLAN standards is on a different frequency band than the others?a) 802.11ab) 802.11bc) 802.11gd) 802.11n2. What does the term "ruggedness" refer to in wireless power amplifiers? a) Ability to withstand thermal stressb) Ability to withstand mechanical stressc) Ability to withstand load mismatchd) All the above3. Which FCC regulation governs the unlicensed ISM band? a) Part 15b) Chapter 11c) 815.00d) Subsection 114. In which semiconductor technology are the majority of cellphone PAs manufactured?a) Si/SiCMOSb) GaNc) GaAs/InGaPd) SiGe5. What is a major advantage of Low Temperature Co-fired Ceramic (LTCC) substrates?a) Densely integrated passive componentsb) Better thermal dissipationc) Lower bill of materialsd) All the above6. Which phone standard supports the highest data rate?a) iDENb) GPRSc) EDGEd) GSM7. Which component is typically not part of a front-end module (FEM)?a) Power amplifierb) Filterc) Switchd) Controller8. Which two systems are most likely to experience concurrent operation problems? a) WLAN + GSMb) Bluetooth + WLANc) GSM + W-CDMAd) Bluetooth + AMPS9. An isolator is typically required at the output of the PA for which transmitter system a) EDGEb) Bluetoothc) GSMd) CDMA/W-CDMA10. What is the commonly claimed nominal operational range for Bluetooth? a) 10 mb) 32.8 ftc) 1.057x10^-15 lt-yrd) All the aboveRF Quiz #7: Radar Fundamentals1. What is a “radar mile?”a) 1 nautical mileb) 1 statute milec) 12.36 µs2. Which best describes a bi-static radar?a) Fixed transmitter and fixed receiver at different locations b) Uses static electricity for both transmitted and received signals c) Only detects fixed (non-moving) targets3. What is a radar cross-section (RCS)?a) An engineering isometric drawing showing a slice through the equipment rack(s)?b) A target’s reflection coefficient relative to a perfectly reflecting spherical surface of 1 m^2cross-sectionc) The plane through which a radar signal passes through a target 4. What are common units of radar cross-section (RCS)? a) dBsmb) dBrcsc) dBm5. Who is known as ”The Father of Radar?”a) Robert Watson-Wattb) Walter Eugene O'Reillyc) Albert Einstein6. Which flying (movement) condition will always result in a Doppler speed of 0 m/s?a) Perfectly constant speed into/out of the antenna boresight b) Perfect concentric circle around antenna at constant altitude c) Speeds at integer multiples of antenna rotation rate 7. What does “MTI” stand for?a) Multiple Target Indicationb) Mean Time Intervalc) Moving Target Indication8. Synthetic Aperture Radar (SAR) radar is mostly likely to be located on which platform?a) Police carb) Shipc) Airplane9. Which feature of a “stealth” aircraft is most responsible for its low observability?a) Radar absorbent paintb) Multi-faceted surfacesc) Minimal use of metals in airframe10. What kind of radar did the webmaster of RF Cafe work on while in the U.S.A.F?a) MPN-14b) RDR-12c) NEXRADRF Quiz #8: Hallmark Decades in Electronics1. In which decade was the transistor invented? a) 1940sb) 1950sc) 1960s2. In which decade was the telegraph invented? a) 1810sb) 1840sc) 1870s3. In which decade was the Internet first implemented? a) 1950sb) 1960sc) 1970s4. In which decade was the first solid state integrated circuit demonstrated?a) 1950sb) 1960sc) 1970s5. In which decade were the first successful diode and triode vacuum tubes invented?a) 1880sb) 1890sc) 1900s6. In which decade was the telephone invented? a) 1850sb) 1860sc) 1870s7. In which decade was the AEEE (now the IEEE) founded? a) 1880sb) 1910sc) 1940s8. In which decade with the first transatlantic radio broadcast occur?a) 1880sb) 1890sc) 1900s9. In which decade was the SPICE simulator introduced? a) 1960sb) 1970sc) 1980s10. In which decade was the ARRL founded?a) 1910sb) 1920sc) 1930sRF Quiz #9: A Smorgasbord of RF Topics1. Where did Bluetooth? get its name?a) Nobody really knowsb) In honor of Harald Blåtand, once king of Denmark c) In honor ofits developer, “Big Blue” (IBM)d) From a Muppets characters by the same name2. Where did ZigBee get its name?a) Nobody really knowsb) From the zigzag path of a beec) Named after the comic strip character, Ziggyd) From the German phrase “sie gabe,“ meaning, “it just works” 3. Who is credited with conceiving of spread spectrum radio communications?a) Dr. Andrew Viterbib) Qualcommc) Actress Hedy Lamarrd) Kinch, the radio operator of Hogan’s Heroes4. What is meant by the front-to-back ratio of a Yagi antenna? a)The physical size of the front half of the antenna vs. the back half b) The number of driven elements vs. number of director elements c) Powerradiated in the front main lobe vs. power in opposite direction d) The weight proportion of the front half of the antenna vs. the back half 5. In an FM modulator with a 10 kHz deviation and a 5 kHz maximum modulating frequency,what is the total occupied bandwidth?a) 10 kHzb) 15 kHzc) 20 kHzd) 30 kHz6. Which WLAN standard provides the highest data rate? a)IEEE802.11a (5.1 GHz RF)54Mbpsb) IEEE802.11b (2.4 GHz RF)11Mbpsc) IEEE802.11g (2.4 GHz RF)54Mbpsd) IEEE802.11n (2.4 GHz RF)100Mbps+7. Why might the mounting orientation of a surface mount capacitor affect frequency response? a) The plates in the body could be either parallel to or perpendicular to the PCB, affectingcouplingb) Adhesion is usually better in one orientationc) Conductive epoxy adhesion is usually better in one orientationd) Orientation makes no difference8. If you were handed an unprocessed wafer of gallium arsenide (GaAs), silicon (Si), silicon-germanium (SiGe), and gallium nitride(GaN), how would you know which is GaN? a) GaN is transparent and the others are notb) The GaN wafer will be noticeably lighter in weightc) The GaN wafer will be much thinner than the othersd) It would not be possible to tell the difference9. The Smith Chart plot of a 50 ohm cable (in a 50 ohm system) spirals inward as theimpedance is plotted through multiple cycles. What is thatindicative of? a) A lossy cableb) A capacitive cablec) An inductive cabled) The cable is coiled on a spool10. What are the three primary JEDEC models used for ESD testing? a) High (HHM), Medium (MHM), and Low (LHM) Humidity Modelb) High (HVM), Medium (MVM), and Low (LVM) Voltage Modelc) Human Body (HBM), Machine (MM), and Charged Device (CDM) Model d) Heidi Klum, Claudia Schiffer, and Gisele BündchenRF Quiz #10: A Sampling of RF Topics 1. What format would a near-filed communications (13 MHz variety) antenna most likely take? a) Inductive coilb) Capacitive platec) Yagid) Parabolic dish2. What does SOLT stand for?a) Short Overload Testb) Simple OperationaL Testc) Short, Open, Load, Throughd) Strategic Offensive Limitation Talks3. Which instrument would be best to use to locate a defective waveguide joint? a) Microscopeb) Micrometerc) Spectrum Analyzerd) Time Domain Reflectometer4. Which entity in the U.S. determines whether an RF energy-emitting device is allowed to be operated?a) The Federal Communications Commissionb) The Amateur Radio Relay Leaguec) The Honor Systemd) The Underwriter’s Laboratory5. What does 2G, 2.5G, 3G, etc., mean in reference to cellphones? a) The average cost of service, expressed in thousands of dollars ($ grand) per yearb) The “generation” of the technologyc) It is an arbitrary alpha-numeric reference coded) The frequency band of operation, in GHz6. Where would you be likely to find a free wireless Internet connection? a) Hotel Lobbyb) Airportc) Your backyardd) All the above7. Who hosts the MTT-S International Microwave Symposium? a) Microwave Journal Magazineb) Microwaves & RF Magazinec) RF Design Magazined) The Institute of Electrical & Electronics Engineers8. What is the “rule of thumb” for estimating RF signal propagation distance vs. time in freespace?a) 1 millimeter per millisecondb) 1 meter per microsecondc) 1 foot per nanosecondd) 1 inch per picosecond9. What is the “rule of thumb” for estimating RF frequency vs. wavelength in free space?a) 300 MHz = 1 meterb) 100 MHz = 1 meterc) 300 MHz = 3 feet (1 yard)d) 100 MHz = 1 foot10. What is the most unique feature of a Helmholtz coil? a) The high voltage makes for cool Jacob’s Laddersb) Magnetic field lines are extremely uniform within the coil c) It is self-poweredd) It uses a rare earth element core1. Which "hand rule" applies for determining the direction of the magnetic field around acurrent-carrying wire? Assume conventional current flow from positive to negative, andmagnetic field leaving the north pole and entering the south pole.a) Right-hand ruleb) Left-hand rulec) Whole-hand rule2. What is the name given to the displaypattern when independent signals are fedinto the x-axis and y-axis ports of anoscilloscope?a) X-Y waveformb) Lissajous waveformc) Complex3. How is the word "Fresnel" pronounced (as in Fresnel zone or Fresnel grating)?a) frēs-n?l'b) frā-n?l'c) fr?s-n?l'4. What type of filter is shown to the right?a) Lowpassb) Highpassc) Bandpass5. What is the order of the filter shown to the right?a) 2b) 4c) 66. What type of transmission line is shown to the right?a) Coaxialb) Striplinec) Microstrip7. What type of waveguide bend is shown to the right?a) 90? Maxwell bendb) 90? H-Plane bendc) 90? E-Plane bend8. What is the value of the resistor shown on to the right?a) 6.2 kΩ, ?5%b) 62 kΩ, ?5%c) 62 kΩ, ?10%9. What serious problem is commonly caused with lead-free, tin-alloy soldersa) Tin whiskersb) Cold flowingc) Spontaneous combustionRF Quiz141. Who from this list is usually credited with being the first to experiment with high frequencyoscillator circuits?a) Benjamin Franklinb) Nikola Teslac) Edwin Armstrongd) Albert Einstein2. In the four basic oscillator circuits shown below, what is the primaryfunction of the transistor?a) Frequency controlb) Amplitude controlc) Compensation for tank circuit lossesd) Isolation3. Which type of oscillator circuit is shown to the right?a) Colpitts oscillatorb) Clapp oscillatorc) Hartley oscillatord) Pierce oscillator4. Which type of oscillator circuit is shown to the right?a) Colpitts oscillatorb) Clapp oscillatorc) Hartley oscillatord) Pierce oscillator5. Which type of oscillator circuit is shown to the right?a) Colpitts oscillatorb) Clapp oscillatorc) Hartley oscillatord) Pierce oscillator6. Which type of oscillator circuit is shown to the right?a) Colpitts oscillatorb) Clapp oscillatorc) Hartley oscillatord) Pierce oscillator7. Which factor is most important in maintaining spectral purity in an oscillator circuit?a) Overall circuit Q (quality factor)b) Component sizesc) Q of individual componentsd) Transistor gain8. What does the term "frequency pulling" refer to?a) Change in frequency due to power supply variationsb) Change in frequency due to load variationsc) Change in frequency due to thermal variationd) All the above9. In a phase-locked loop (PLL) oscillator circuit, what does the phase detector do?a) Detects phaseb) Compares relative phase between the reference input andoscillator output and introducesa shift as necessary to maintain phase coherencec) Injects random phase shifts at the input to stabilize the output frequency d) Phase detectors are not used in PLL circuits10. Complete the following adage used in the days before computer simulators. "If you want anoscillator, design an amplifier. If you want an amplifier, design a(n) ____."a) Amplifierb) Filterc) Oscillatord) RadioRF Quiz15231. To which constant is 6.022*10/ mol assigned?a) universal constantb) Avogadro's constantc) electric fieldd) gravitational constant2. To which constant is 2.718 assigned?a) base of natural logarithmsb) base of unnatural logarithmsc) ratio of major and semi-major axis of an ellipse d) dielectric constant of ceramic3. To which constant is 9,192,631,770 assigned?a) astronomical unitb) oscillations of a cesium atom in exactly one second c) picoangstroms in a meterd) hours in a lightyear-354. To which constant is 1.616*10 m assigned?a) Planck lengthb) thickness of a human hairc) wavelength of yellow lightd) tolerance of the standard meter-285. To which constant is 9.11*10 g assigned?a) neutron rest massb) proton accelerationc) electron rest massd) photon acceleration6. To which constant is 9.81 m/s? assigned?a) speed of light in a vacuumb) dielectric constant of a vacuumc) acceleration of gravity near Earth's surface d) magnetic constant-127. To which constant is 8.854*10 F/m assigned?a) rate of change of temperature in silicon b) speed of light in a vacuumc) permittivity of free spaced) permeability of free space88. To which constant is 2.998*10 km/s assigned to?a) orbital velocityb) electron speedc) acceleration of gravityd) speed of light in a vacuum-239. To which constant is 1.3807*10 J/K assigned?a) universal gas constantb) carbon band energyc) uranium band energyd) Boltzmann's constant-610. To which constant is 1.257*10 H/m assigned?a) Bohr radiusb) speed of light in a vacuumc) permittivity of free spaced) permeability of free spaceRF Quiz161. What does dBi, the most often used unit for antenna gain (or directivity), stand for?a) Decibels of isolationb) Isometric radiation in decibelsc) Decibels of gain relative to an isotropic radiator d) Intrinsic gain in decibels2. For which region of space does antenna gain normally apply?a) Near fieldb) Far fieldc) At the feed pointd) EverywhereElevation Pattern Azimuth Pattern3.For which type of antenna does the pattern to the right describe?a) Parabolicb) Yagic) 1/2-wave dipoled) 1/4-wave vertical whip4. What is the free space impedance that an antenna "sees?"a) 50 Ωb) 75 Ωc) 16p Ω (?50 Ω)d) 120p Ω (?377 Ω)5. What is the name given to the point where the RF input signal interfaces to the antenna?a) ICP (input connection point)b) Feed-pointc) BNC connectord) N connector6. Where is the approximate transition point between near field and far field?a) λ / (2p)b) λc) 5λd) 10λ7. What is an isotropic radiator?a) An antenna that radiates equally in all directions b) An antenna with equal dimensionsc) An antenna designed to broadcast in the troposphere d) None of the above8. Which type of antenna would typically have the highest directivity?a) 1/4-wave whipb) Folded dipolec) Yagid) Parabolic9. On a center-fed 1/2-wave dipole, where is the voltage potential the highest?a) In the centerb) At the tipsc) Equal everywhered) Nowhere - dipoles operate on current10. Yagi antennas are constructed of which three types of elements?a) Transmitter, receiver, and transceiverb) Underdriven, driven, and overdrivenc) Reflector, driven, and directord) Aluminum, iron, and magnesiumRF Quiz171. Who is credited with inventing the computer mouse?a) Bill Gatesb) Steve Jobsc) Bill Nye (the science guy)d) Douglas Engelbart2. Who is credited with discovering the transistor?a) John Bardeenb) William Shockleyc) Walter Brattaind) All the above3. Who invented the Viterbi programming algorithm?a) Andrew Viterbib) Robert Peasec) Albert Einsteind) Robert Lucky4. Who is credited with inventing the triode amplifier vacuum tube (Audion)?a) Sir Jonathan Audionb) James Wattc) Brian Koenigsmarkd) Lee De Forest5. Who invented the tunnel diode?a) Scott Adamsb) Leo Esakic) Patrick Fitzgeraldd) Igor Stravinsky6. Who is credited with inventing spread spectrum communications?a) Akio Moritab) Thomas Steenlandc) Hedy Lamarrd) Albert Gore7. Who is credited with inventing frequency modulation (FM)?a) Edwin Armstrongb) Heike Onnesc) Robert Jarvikd) Charlie Eppes8. Who is credited with inventing television?a) Yataro Iwasakib) Lothar Rohdec) Hermann Schwarzd) Philo Farnsworth9. Who is credited with inventing radar?a) Gordon Gouldb) Elmer Sperryc) Sir Robert Watson-Wattd) Augustus Raytheon10. Who is credited with inventing the first integrated circuit?a) Garrett Morganb) Jack Kilbyc) James (Jim) Wilsond) Grace HopperRF Quiz18. Gutta perchaa) 16th century Indian physicist b) Latin for "cat gut," used for stringed instrumentsc) Cable insulationd) Explosive compound2. Condensera) Capacitorb) Air pumpc) Mass compactord) Electrical probe3. Luminiferous aethera) Flame created by laboratory heatersb) Medium that supports the transmission oflight particlesc) The "light of the moon" d) Glowing gas4. Thermionic valvea) Vacuum tube diodeb) Heat flow switchc) Systolic pumpd) Lock5. Dephlogisticated aira) Dry (dehumidified) air b) Perfect vacuumc) Supersaturated aird) Molecular oxygen6. Corpusclea) Low-ranking enlisted man's bicepb) Free radicalc) Electrond) Light particle7. Audiona) Music aficionadob) Sound generatorc) Vacuum tube trioded) Sound level meter8. Calorica) A stomach settling medical remedyb) Unit of workc) Unit of electrical resistance d) Fluid responsible for heat flow9. Leyden jar。
