Klystron operation is based on the principle of Velocity modulation
Description : What is the basic principle of operation of a klystron?
Last Answer : Velocity modulation
Description : Principle of operation of LVDT is based on the variation of A) Mutual inductance B) Self-inductance C) Capacitance D) Resistance
Last Answer : 3
Description : In a klystron amplifier the input cavity is called: (1) Buncher (2) Catcher (3) Pierce gun (4) Collector
Last Answer : In a klystron amplifier the input cavity is called: Buncher.
Description : Reflex klystron is a: (1) Low power generator (2) High power oscillator (3) Low gain amplifier (4) Not an oscillator
Last Answer : Reflex klystron is a: Low power generator.
Last Answer : The modes in a reflex Klystron gives the same frequency but different transit time.
Description : If the constant-speed electrons in a reflex klystron remain in the repeller field for 1 3/4 cycles, what is the mode of operation?
Last Answer : Mode 2.
Description : What limits the tuning range around the center frequency of a reflex klystron in a particular mode of operation?
Last Answer : The half-power points of the mode.
Description : The operation of the fiber-optic cable is based on the principle of a. Refraction b. Reflection c. Dispersion d. Absorption
Last Answer : b. Reflection
Description : Operation of McLeod gauge used for low pressure measurement is based on the principle of (A) Gas law (B) Boyle's law (C) Charles law
Last Answer : Answer: Option B
Description : The underlying principle of operation of the parametric amplifier is based on what property?
Last Answer : Reactance.
Description : The operation of a fiber-optic cable is based on the principle of ∙ A. refraction ∙ B. reflection ∙ C. dispersion ∙ D. absorption
Last Answer : A. refraction
Description : The operation of the fiber-optic cable is based on the principle of ∙ a. Refraction ∙ b. Reflection ∙ c. Dispersion ∙ d. Absorption
Last Answer : ∙ b. Reflection
Description : Explain the principle of operation of solenoid. State two parameters on which selection of solenoid is based.
Last Answer : Diagram : Principle: A solenoid is a simple electromagnetic device that converts electrical energy directly into linear mechanical motion, but it has a very short stroke (length of movement), ... Parameters on which selection of solenoid is based1. Size 2. Flow capacity 3. Applied Voltage
Description : The operation of a ramp type Digital Voltmeter is based on the principle of (A) Voltage-to-current conversion. (B) Voltage-to-time conversion. (C) Current-to-time conversion. (D) Current-to-frequency conversion.
Last Answer : The operation of a ramp type Digital Voltmeter is based on the principle of Voltage-to-time conversion.
Last Answer : The principle of operation of Q-meter is based on Series resonance.
Description : Which of the following types of HPA is not used in earth stations? A. TWT B. Transistor C. Klystron D. Magnetron
Last Answer : D. Magnetron
Description : A major and basic advantage for the use of a klystron. A. High power B. Efficiency C. Lesser noise D. Cheaper
Last Answer : A. High power
Description : What type of klystron is used as the final stage of a power- amplifier transmitter?
Last Answer : Multicavity klystron.
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 : The constant-speed electrons of an electron bunch in a reflex klystron must remain in the repeller field for what minimum time?
Last Answer : Three-quarter cycle.
Description : When the repealer potential is constant, what property of the electron determines how long it will remain in the drift space of the reflex klystron?
Last Answer : Velocity.
Description : What element of the reflex klystron replaces the output cavity of a normal klystron?
Last Answer : The reflector or repeller.
Description : The cavities of a multicavity klystron are tuned to slightly different frequencies in what method of tuning?
Last Answer : Stagger tuning.
Description : In a multicavity klystron, tuning all the cavities to the same frequency has what effect on the bandwidth of the tube?
Last Answer : The bandwidth decreases.
Description : Which cavity of a three-cavity klystron causes most of the velocity modulation?
Last Answer : The middle cavity.
Description : How is the electron beam of a three-cavity klystron accelerated toward the drift tube?
Last Answer : A large negative pulse is applied to the cathode.
Description : What can be added to the basic two-cavity klystron to increase the amount of velocity modulation and the power output?
Last Answer : Intermediate cavities between the input and output cavities.
Description : A two-cavity klystron without a feedback path will operate as what type of circuit?
Last Answer : Amplifier.
Description : The two-cavity klystron uses what cavity as an output cavity?
Last Answer : The catcher cavity.
Description : The electrons in the beam of a klystron are speeded up by a high dc potential applied to what elements?
Last Answer : The accelerator grid and the buncher grids.
Description : What should you do if a klystron becomes gassy?
Last Answer : Restore it to serviceable condition by operating it temporarily at reduced beam voltage.
Description : Describe working of Reflex Klystron amplifier with a neat diagram.
Last Answer : Operation: It is assumed that the oscillations are set up in the tube initially due to noise or switching transients and these oscillations are sustained by device operation. ... on the reference electron. These bunch transfer maximum energy to the gap to get sustained oscillations.
Description : A two cavity klystron tube is a (A) velocity modulated tube (B) frequency modulated tube (C) Amplitude modulated tube (D) simple triode
Last Answer : A two cavity klystron tube is a velocity modulated tube
Description : In a Klystron amplifier, the RF voltage produces (a) amplitude modulation (b) frequency modulation (c) phase modulation (d) velocity modulation
Last Answer : In a Klystron amplifier, the RF voltage produces velocity modulation
Description : What is PLL? Explain its operation with a block diagram.
Last Answer : PLL - A phase-locked loop or phase lock loop is a control system that generates an output signal whose phase is related to the phase of an input signal Block diagram ... to the input frequency. The phase - locked loop goes through three states free running capture and phase lock.
Description : Draw & explain operation of phase detector.
Last Answer : In phase detector, the op-Amp basically acts as a zero crossing detector. If a sine wave is applied at the i/p, we get square wave at the op-Amp o/p (at point ... to two channel of the CRO. The time duration between the pulses corresponding to voltages represent the phase between them.
Description : The condition for parallel operation of two inverters is • Amplitude of voltages should be same. • Frequency of voltages should be same. • Both the voltages should be in same phase. • All the three above.
Last Answer : The condition for parallel operation of two inverters is • Amplitude of voltages should be same. • Frequency of voltages should be same. • Both the voltages should be in same phase. • All the three above.
Description : The operation of a JFET involves (A) A flow of minority carriers (B) a flow 0f majority carriers (C) recombination (D) negative resistance
Last Answer : The operation of a JFET involves a flow 0f majority carriers
Description : Which of the following diodes is limited to the reverse-bias region in its region of operation? (1) Schottky (2) Tunnel (3) Photodiode (4) Rectifier
Last Answer : Photodiode is limited to the reverse-bias region in its region of operation.
Last Answer : Superhetrodyne principle provides selectivity at IF stages
Last Answer : The principle of emission of electrons from a metal surface, under the influence of light is known as Photo electric emission.
Description : What is the principle employed in the operation of an artificial kidney?
Last Answer : Dialyisis
Description : The fundamental scientific principle in the operation of battery is – (1) acid-base interaction (2) dialysis (3) dissociation of electrolytes (4) oxidation-reduction
Last Answer : (3) dissociation of electrolytes Explanation: The electrolyte consists of a solvent (water, an organic liquid, or even a solid) and one or more chemicals that dissociate into ions in the solvent. These ... that contains ions and can be decomposed by electrolysis, e.g., that present in a battery.
Description : What Is Basic Principle Of Operation Of Alternators/dc Generators?
Last Answer : They are working on the fundamental principle based on Faraday’s Laws of Electromagnetic Induction. This law states that, When a current carrying conductor moves in magnetic field, it induces an EMF.
Description : What is the principle of operation of shaded-pole induction motor?
Last Answer : A shaded-pole motor is basically a small single-phase squirrel cage motor in which the starting winding is composed of short-circuited copper ring (called shading coil) surrounding one-third of each pole ... rotating magnetic field. As a result, the rotor is set in motion due to induction principle.
Description : Explain in brief the principle of operation of successive Approximation ADC.
Last Answer : The circuit of successive approximation ADC consists of a successive approximation register (SAR), to find the required value of each bit by trial & error.With the arrival of START command, SAR sets the MSB ... /P signal. This O/P is low or High. This process continues until all bits are checked.
Description : Explain the principle of operation of attracted armature relay with equation and characteristics curve.
Last Answer : Principle: It works on the principle that when a current is passed through a coil magnetic lines of force develop and the coil behaves like a magnet. When we place a magnetic material inside the coil it is ... ) time delay. If we want a time delay we can add a slug in the armature core.
Description : Comment on the working principle of operation of a single-phase transformer.
Last Answer : Working principle of operation of a single-phase transformer can be explained as An AC supply passes through the primary winding, a current will start flowing in the primary winding. As ... is known as mutually induced voltage. Hence, transformer works on the principle of electromagnetic induction.
Description : Draw block diagram of frequency meter and state it’s principle of operation
Last Answer : Block diagram Principle The signal may be amplified before being applied to the Schmitt trigger. The Schmitt trigger converts the input signal into a square wave with fast rise and fall times, ... time interval between start and stop gate then, frequency of unknown signalis, f = N / t