19.9.10

Electronics Trivia 8

In pc motor, mechanical output power is from

  • electrical input defect

The point defect resulting a missing atom in a lattice is

  • vacancy defect

Protection of lightning stroke

  • lightning arrester and ground wire

When everything held constant which of the ff does not affect the inductance of the air core

  • Frequency

The absolute limit of the component density in an IC technology is determined by the

  • size of semi conductor

If the ratio of the inductive reactance is decrease

  • the phase angle decreases

If the operating temperature is 155°C this is under motor classification of

  • Class F

Main characteristic of pot-coil inductor is

  • more inductive less in volume

Class A amplifier

  • is bias in which Vc can swing in equal distance in either side of Q point

SCARA (Selective Compliant Assembly Robot Arm) is use for

  • assembly operation practically in the field of engineering
The two opposing tort having equal amplitude when a pointer of a measuring instrument finally goes at rest

  • deflecting tort and restoring tort

Crystal oscillator provides

  • stable carrier wave for radio transmitter

A full-adder

  • adds two binary digits and carry previous addition

An index register of a digital computer is

  • used for address modification

A servo-motor robot moves between _____ stops

  • soft

After firing SCR, the gating current is removed, the SCR current is

  • still the same

VTVM produces negligible loading effect because of its

  • high internal Resistance

To avoid a high noise figure in an amplifier the volume control must have

  • low DC current

A neighboring atom of a crystal lattice structure like a Ge form a ___ bond

  • covalent

A neighboring atom of a crystal lattice structure like a Ge form a ___ bond

  • solid state device

A moving coil voltmeter is for

  • DC voltage only

The output of Class B amplifier is

  • positive half cycle only

Capacitor that helps multivibrator to transfer from one state to another instantaneously

  • commutator capacitor, step-up capacitor, transpose capacitor

Positive and negative complex waves is symmetrical

  • if it has an odd harmonics

Maxwell L/C is so called

  • balance because it has two opposite impedances in opposite arm

The ratio in which the circuit opposes oscillation is

  • damping ratio

Inverse saturation current (Ico)

  • increases in every 10° C increase in temperature

When a purely inductive coil is fed to a complex wave, the current has

  • less distortion

The energy required to obtain electrons in the valence shell is

  • very less

In any atom, the potential energy of  an orbiting electron.

  • is always negative

For sustaining oscillation, for a feedback amplifier. The loop gain is

  • greater than one

Essential feature of a non-servo 

  • Controlled robot:
  • each axis moves only between hardware stops.

When a discharge fluorescent lamp has to be used in dc supply, what component needs to be connected in series with it?

  • Resistor

When a large amount of analog signal is to     be converted to digital form, an analog multiplier is used. An A to D converter most suitable in this case will be.

  • successive approximation type

Consist of two interdependent circuits such that the output of each controls the input of the other:

  • relaxation oscillator

Moving coil voltmeter measures

  • only DC voltages

The capacitance of the capacitor is NOT influence by:

  • plate thickness

Produces a low output when one or both input is high:

  • NOR Gate

1ms can be converted to 10ms using:

  • Monoastable multivibrator

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