19.9.10

Electronics Trivia 11

A solar cell operates on a principle of:

  • photovoltaic action

The temperature coefficient of an extrinsic semiconductor material is _______.

  • Negative

For a silicon diode, the forward bias voltage 

  • Must be greater than 0.7V

What do you call a “computer on a chip”?

  • Transputer

Monolithic technique is ideally suitable in fabricating _______

  • digital IC’s

For a given line voltage, for heating coils will produce maximum heat when connected in ______.

  • Parallel

Frequency stability in an oscillator can be achieved by _________.

  • incorporating tuned circuits

Lower cut-off frequency of an amplifier can be determined by its _____.

  • Capacitance coupling and bypass capacitor

The sediment which accumulates at the bottom of a lead-acid battery consists largely of ______.

  • Antimony-lead alloy

The function of a pilot cell in a storage battery is to _______.

  • Indicate the condition of the entire battery.

Class of amplifier which has the highest distortion.

  • Class C

Unit of Magnetic flux

  • Weber

During charging of a lead-acid cell

  • its volume increases

Unit of electric intensity

  • Newton/coulomb and Volt/meter

Active materials nickel-iron battery

  • Nickel hydroxide, powdered iron and its sodium and 20% solution of caustic 

Unit of permeability of a medium

  • Farad/meter

In line voltages, heating coil will produce maximum heat when connected in

  • Parallel

kpW is classified as

  • recording instrument

The most dangerous short circuit is

  • dead short circuit

The first IC chip was invented by

  • J. S. Kilby

In high pass RC circuit, when the value of capacitance is doubled, the frequency cut-off is

  • Halved
Hay bridge is used in

  • measuring inductance impedance with large phase angle

A transputer has __ bits.

  • 32

BCD is a _____.

  • binary code

2 x 8 RAN means

  • 2 eight bit data words

Lead-acid cell does not depend on ______.

  • rate of change

When charge is given to the battery taken off from a vehicle is called ______.

  • bench charge

In forward bias, the diode

  • conducts current

The capacitor has 

  • 2 conductors separated by a dielectric

A dual trace CRO has

  • 1 electron gun and 1 two-pole switch

Gold is used in doping a semiconductor material to

  • reduce storage time

What element is not suited for doping an intrinsic to be converted into an N Type extrinsic semiconductor?

  • Iridium

JFET operates in

  • depletion mode only

The trickle charge of storage battery

  • keeps the battery fresh and fully charged

Consider the energy gap diagram of an intrinsic semiconductor. FERMI lies on the ______.

  • Forbidden gap

The operation of Q-meter is based on _______.

  • series resonance

The temperature coefficient of an extrinsic semiconductor is _______

  • Negative

A 32 bit, “Computer on a chip” is also known as ___

  • Transputer

In a low pass filter, the cut-off frequency is represented by a point where the output voltage is reduced to _____% of the input voltage.

  • 70.7%

In higher forward voltages, a junction diode is likely to ______.

  • burn out

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