E6D01

How is the electron beam deflected in a vidicon?

  1. By varying electromagnetic fields

E6D02

What is cathode ray tube (CRT) persistence?

  1. The length of time the image remains on the screen after the beam is turned off

E6D03

If a cathode ray tube (CRT) is designed to operate with an anode voltage of 25,000 volts, what will happen if the anode voltage is increased to 35,000 volts?

  1. The image size will decrease

E6D04

Exceeding what design rating can cause a cathode ray tube (CRT) to generate X-rays?

  1. The anode voltage

E6D05

Which of the following is true of a charge-coupled device (CCD)?

  1. It samples an analog signal and passes it in stages from the input to the output

E6D06

What function does a charge-coupled device (CCD) serve in a modern video camera?

  1. It stores photogenerated charges as signals corresponding to pixels

E6D07

What is a liquid-crystal display (LCD)?

  1. A display that uses a crystalline liquid to change the way light is refracted

E6D08

What material property determines the inductance of a toroidal inductor with a 10-turn winding?

  1. Core permeability

E6D09

What is the usable frequency range of inductors that use toroidal cores, assuming a correct selection of core material for the frequency being used?

  1. From less than 20 Hz to approximately 300 MHz

E6D10

What is one important reason for using powdered-iron toroids rather than ferrite toroids in an inductor?

  1. Powdered-iron toroids generally have better temperature stability

E6D11

What devices are commonly used as VHF and UHF parasitic suppressors at the input and output terminals of transistorized HF amplifiers?

  1. Ferrite beads

E6D12

What is a primary advantage of using a toroidal core instead of a solenoidal core in an inductor?

  1. Toroidal cores have lower Q characteristics

E6D13

How many turns will be required to produce a 1-mH inductor using a ferrite toroidal core that has an inductance index (A L) value of 523 millihenrys/1000 turns?

  1. 43 turns

E6D14

How many turns will be required to produce a 5-microhenry inductor using a powdered-iron toroidal core that has an inductance index (A L) value of 40 microhenrys/100 turns?

  1. 35 turns

E6D15

What type of CRT deflection is better when high-frequency waves are to be displayed on the screen?

  1. Electrostatic

E6D16

Which is NOT true of a charge-coupled device (CCD)?

  1. It is commonly used as an analog-to-digital converter

E6D17

What is the principle advantage of liquid-crystal display (LCD) devices over other types of display devices?

  1. They consume less power

E6D18

What is one reason for using ferrite toroids rather than powdered-iron toroids in an inductor?

  1. Ferrite toroids generally require fewer turns to produce a given inductance value

 

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