19.9.10

Electronics Trivia 4

Diode use for high speed switching


  • Shockley Diode

What motor characteristic is affected by counter emf?

  • Speed

What is the greater threat for diode?

  • Heat

What amplifier has the highest degree of fidelity?

  • Class A 

Mechanical Computer is considered to what type?

  • Analog

What is the power source of synchrous?

  • AC

How is EPROM erased?

  • With a burst of ultra violet rays

What meter is used to measure insulation resistance?

  • Megger

What is the greatest advantage of a VOM?

  • No external power is required

What is the output of half wave rectifier?

  • Half wave rectified signal

Transistor battery best fits in___

  • Electronic Calculator

Hexagonal closed packed crystalline___

  • Zinc

In IC fabrication, the minimum distance between features

  • Geometry

In power supply design, 15 VDC output 20 VAC inputs which are not required?

  • UPS

High sensitivity substance

  • Permanent Magnet

Ferromagnetic  Materials

  • Concentrates magnetic flux line within itself

In RL plane, what is shown?

  • unique combination of resistive and inductive reactance.

It increases inductance in the inductor

  • Ferromagnetic Core

What are the advantages of metal oxide semiconductor?

  • Sensitive an can be damage electro statically 

A DC voltmeter is high sensitive and accurate in measuring

  • High resistance circuit

A net electric charge in an isolated system remains constant

  • Law of Conservation of Charge

A change of crystal frequency when L or C connected in parallel

  • 0.1 %

DC armature resistance

  • 0.5  

In context of corona, if the conductor is polished and smooth which statement is true?  

  • Corona glows uniformly along the length of  conductor

Maximum change of power that a normal human can hear

  • 1 dB

An error which cannot be correct through calibration or any method of control which source is unknown

  • Random Error

Minimum increment measurable with certainty in instrument

  • Resolution

Which of the following is not a sinusoidal wave generator?

  • Multivibrator

Meter movement uses current induced in thermocouple by heating the resistive element.

  • Thermocouple Meter Movement

It is the movement of holes

  • Hole Current

Refers to the mean time of which the excess of electrons and holes exists before they recombined and disappeared

  • excess carrier lifetime

The process of adding impurities in pure semiconductor.

  • Doping

A periodic waveform possessing half symmetry has no.

  • Even harmonics

In BJT, IB=100µA and IC=10mA what is the range of beta?

  • 1.01 to 10

When two simple low pass filter having the same values of R and C in cascaded the combined filters will have a roll off of

  • -40dB/decade

The input impulses gets converted to spike on the alternating polarities using a high pass RL circuit with small time constant.

  • peaking

A circuit used to generate a rectangular waveform and hence used to gate to other circuit.

  • gating circuit

The circuit is tuned by changing the voltage applied at resonance frequency.

  • electrical tuning

Non sinusoidal waveform are made up of

  • different sinusoidal waveform

The most useful AC Bridge for comparing capacitances of two air capacitors.

  • De Sauty Bridge

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