Description : What effect does the shielding of the screen grid by the control grid have on plate current in beam-forming tetrodes?
Last Answer : By increasing the number of electrons that reach the plate, plate current is increased.
Description : How does transit time affect the relationship of the grid voltage and the plate current at high frequencies?
Last Answer : Transit time causes the grid voltage and plate current to be out of phase
Description : A tube has a transconductance of 800 mhos and a load resistor of 50 kohms. When control grid voltage varies by 6 volts, the plate voltage will vary by what amount?
Last Answer : 240 volts.
Description : If the mu of a tube is 85 and the signal at the control grid is 4 volts ac, the plate voltage will vary by what amount?
Last Answer : 340 volts.
Description : The plate voltage of a tube will vary 126 volts when a 3-volt ac signal is applied to the control grid. What is the gain of this tube?
Last Answer : 42.
Description : What undesirable effect does the screen grid in a tetrode create?
Last Answer : Secondary emission, and noise.
Description : Can we just go with the Flo into the 10k mansion?
Last Answer : flo! You made it to the mansion! Congo rats! Burritos for all!
Description : Are Kino-Flo Tungsten Balanced lights truly tungsten balanced?
Last Answer : Wow, I will be so surprised if you get an expert answer here. I would guess so, but I’m not a film guy so I’ve never used them. Don’t they have published color temperatures for their products on their website?
Description : What is Flo Rock?
Last Answer : What part of the west coast? I’ve never seen it.
Description : A combination of four resistances is shown in Fig. 4.59. Calculate the potential difference between the points P and Q, and the values of currents flo
Last Answer : A combination of four resistances is shown in Fig. 4.59. Calculate the potential difference ... of currents flowing in the different resistances.
Description : The ratio of depths at partial flo A. 1 – B. 1 – C. ½ (1 – D. ½ (1 –
Last Answer : ANS: C
Description : Which of the listed components does line 'C' represent for the transistor illustrated? EL-0068 A. Grid B. Plate C. Emitter D. Collector
Last Answer : Answer: C
Description : What are the three elements of a bipolar transistor? Are they the: w) grid, plate, cathode x) suppressor, deflector, target y) energizer, controller, terminus z) emitter, base, collector
Last Answer : ANSWER: Z -- EMITTER, BASE, COLLECTOR
Description : Once ionization has occurred in a thyratron, what control does the control grid have over the tube’s operation?
Last Answer : None.
Description : What is the major difference in grid construction between power pentodes and conventional pentodes?
Last Answer : Conventional pentodes have a staggered grid arrangement, while power pentodes have a shielded grid arrangement.
Description : What serves as a grid in a magnetron?
Last Answer : A magnetic field.
Description : In a circuit using grid-leak biasing, the coupling capacitor (Cc) chargcharge path?
Last Answer : rkg, the cathode to grid resistance.
Description : Why the control grid of a triode amplifier is negatively biased?
Last Answer : To prevent them from drawing grid current.
Description : The suppressor grid is added to a tetrode to reduce what undesirable characteristic of tetrode operation?
Last Answer : Secondary emission.
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 : When is a control-grid modulator used?
Last Answer : In cases when the use of a minimum of af modulator power is desired.
Description : What effect does closer spacing of plates have on the electron beam?
Last Answer : A greater deflection angle.
Description : What effect do longer deflection plates have on the electron beam?
Description : Debunching of the electron bunches in the higher modes of a reflex klystron has what effect on output power?
Last Answer : Power is reduced.
Description : What is the effect upon an electron that enters the buncher gap when the potential across the grids is at 0 volts?
Last Answer : There is no effect
Description : What will be the effect upon an electron traveling in the opposite direction to the lines of force in an electrostatic field?
Last Answer : The electron will be accelerated.
Description : What does cloud computing mean, and are the benefits of it greater than grid computing?
Last Answer : Cloud computing or grid computing depends on the task at hand. If you want to focus on a single enormous task, then go with grid computing. Cloud computing is more for multitasking.
Description : When microwave energy is passed through a piece of ferrite in a magnetic field, another effect occurs. If the frequency of the microwave energy is much greater than the electron wobble frequency, the plane of polarization of the wavefront is rotated. This is known as
Last Answer : Faraday Rotation Effect
Description : The greater acidity of carboxylic acids compared to alcohols arises primarily from : (a) the electron-donating effect of the hydroxyl group (b) the electron-withdrawing effect of the carboxyl ... of α-hydrogens of carboxylic acids (d) the resonance stability associated with the carboxylate ion
Last Answer : the resonance stability associated with the carboxylate ion
Description : Light travels faster in a material with a lower refractive index. Therefore, light rays that travel a longer distance in a lower refractive index travel at a greater average velocity. What effect does this have on multimode graded-index fiber modal dispersion and bandwidth?
Last Answer : Decreases the time difference between light rays, which reduces modal dispersion and increases fiber bandwidth.
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 the term used to identify the amount of field strength required to cause the electrons to just miss the plate and return to the filament in a circular orbit?
Last Answer : The critical value of field strength
Description : A large negative voltage is applied to the plate of a diode, and a largewhat tube parameter has been exceeded?
Last Answer : Peak Inverse Voltage (PIV).
Description : How much must the fpa plate current vary to produce 100- percent modulation in a plate modulator?
Last Answer : Between 0 and nearly two times its unmodulated value.
Description : The modulator is required to be what kind of a circuit stage in a plate modulator?
Last Answer : Power amplifier
Description : For what class of operation is the final rf power amplifier of a plate-modulator circuit biased?
Last Answer : Class C
Description : The resonant frequency of electron wobble can be changed by variation of what force?
Last Answer : The applied magnetic field.
Description : Which of the two types of electron motion (orbital movement and electron spin) is more important in the explanation of magnetism?
Last Answer : Electron spin.
Description : Why are the electrostatic fields between the electron gun elements called lenses?
Last Answer : Because they bend electron streams in much the same manner that optical lenses bend light rays.
Description : The electron beam in a CRT is made to sweep from left to right across the screen. What tube element causes this sweeping motion?
Last Answer : The horizontal-deflection plate.
Description : What term is used for the ability of a spot on a CRT screen to continue to glow after the electron bean has struck it and moved away?
Last Answer : Persistence.
Description : What are two advantages that gas-filled tubes have over conventional electron tubes?
Last Answer : a. They can carry more current. b. They maintain a constant IR drop across the tube
Description : Why is electron flow with the arrow in the symbol of a Zener diode instead of against the arrow as it is in a normal diode?
Last Answer : Because Zener diodes are operated in the reverse bias mode.
Description : What term is used to describe the definite discrete amounts of energy required to move an electron from a low shell to a higher shell?
Last Answer : Quanta.
Description : What type of deflection is preferred for a crt electron beam?
Last Answer : . Electromagnetic.
Description : In an electron tube regulator, the electron tube replaces what component?
Last Answer : Variable resistor.
Description : What type of electron-resonance anode block does not require strapping?
Last Answer : Rising-sun block.
Description : What element in the magnetron causes the curved path of electron flow?
Last Answer : The permanent magnet.
Description : What relationship must exist between the electron beam and the traveling wave for bunching to occur in the electron beam of a twt?
Last Answer : The traveling wave must have a forward velocity equal to or less than the speed of the electrons in the beam.