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Electronics Quiz Questions with Answers – What is Electronics

Electronics Quiz Questions with Answers – What is Electronics – Electronics GK


Electronics Quiz Questions with Answers



 Electronics Quiz Questions – Electronics GK Part 1 (Questions 1-15)


1) What do you mean by electronics?

Answer: The study of behavior of electrons, their control and use.


2) The process of adding certain impurities in the crystal structure of a semi-conductor so as to improve its conductivity is called?

Answer: Doping.


3) It is a process of allowing electric current to flow only in one direction that is changing A.C in to D.C.

Answer: Rectification.


4) What is called amplification?

Answer: It is the process of strengthening weak signals.


5) What is oscillation?

Answer: It is a process of conversion of D.C in to a signal of desired frequency.


6) What is liquid crystal?

Answer: They are organic compounds resembling both liquid and crystals.


7) Which of the electronics is known as wonder child of electronics?

Answer: Transistor.


8) Which device work on the principle of thermionic emission?

Answer: Valve.


9) The function of valve depends on the phenomenon?

Answer: Thermionic emission.


10) The third electrode in a triode is known as?

Answer: Control grid.


11) Electricity is not conducted through germanium because the number _?

Answer: Free electrons are comparatively less.


12) The thermionic valve named triode has _?

Answer: 3 electrodes.


13) The impurity to be added to get n-type semi-conductor is _?

Answer: Arsenic.


14) The impurity to be added to get p-type semi-conductor is _?

Answer: Boron.


15) Current conduction in p-type semi-conductor is due to _?

Answer: Holes.


Electronics Quiz Questions – Electronics GK Part 2 (Questions 15-30)

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16) Current conduction in n-type semi-conductor is due to _?

Answer: Free electrons.


17) Semi-conductor crystal having an excess of electrons by doping is named?

Answer: N-type semi-conductor.


18) Example of donor is?

Answer: Antimony.


19) Example of acceptor is?

Answer: Gallium.


20) The hole is considered as?

Answer: Equivalent of a positive charge.


21) The process of extracting audio signals from high frequency carrier waive is known as?

Answer: Detection.


22) The upper limit of audibility for a normal human ear is?

Answer: 20000.


23) Detection is a kind of _?

Answer: Rectification.


24) The reverse process of modulation is _?

Answer: Detection.


25) The middle region of transistor is known as?

Answer: Base.


26) The current carriers in PNP transistor consist of _?

Answer: Holes.


27) The current carriers in NPN transistor consist of _?

Answer: Electrons.


28) The device which can be used as an amplifier and an oscillator is _?

Answer: Transistor.


29) A function which cannot be done by a junction of a diode is _?

Answer: Oscillation.


30) Power gain is equal to _?

Answer: Voltage gain x Current gain.


Electronics Quiz Questions – Electronics GK Part 3 (Questions 31-45)


31) For producing high frequency carrier wave we use:

Answer: Oscillator.


32) The vacuum tubes (valves) were discovered by:

Answer: Lee de Forest.


33) The process of broadcasting in which the frequency of radio waves is changed in accordance with the sound signals is known as:

Answer: Frequency modulation.


34) Which is the main part of a tuner in the radio receiver?

Answer: Variable condenser.


35) The process of making a radio receiver sensitive to a particular frequency alone is known as:

Answer: Tuning.


36) During play back of a tape recorder, the tape is drawn past the poles of the head at a constant speed of:

Answer: 5 cm/second.


37) The part of T.V camera which produces the beam required for scanning is called:

Answer: Electron gun.


38) In our T.V. system time taken for scanning one frame is:

Answer: 1/25 second.


39) The rays starting from the cathode discharge tube are called:

Answer: Cathode rays.


40) The scientist who discovered that though gases are not good conductors, high voltage electricity can discharge through gases was:

Answer: William Crookes.


41) The unit used to express wave length is:

Answer: Angstrom.


42) The value of capacitor is expressed in the unit:

Answer: Farad.


43) The waves used in radar can be considered to be:

Answer: Micro waves.


44) Image orthicon is a kind of:

Answer: Pick up tube.


45) Who invented the tunnel diode?

Answer: Leo Esaki.


Electronics Quiz Questions – Electronics GK Part 4 (Questions 46-60)


46) The simplest type of valve is called:

Answer: Diode.


47) The valve having three electrodes is known as:

Answer: Triode.


48) Substances like glass, mica and rubber are called:

Answer: Insulators.


49) In the pure state the semiconductors are known as what?

Answer: Intrinsic.


50) After doping a semiconductor will have good electrical conductivity. In such a stage it will be known as:

Answer: Extrinsic.


51) If a silicon crystal is doped with an element of group five it becomes:

Answer: N-type semiconductor.


52) The impurity used to make p-type semiconductor is:

Answer: Boron or gallium or indium.


53) The majority carriers in n-type semiconductor is:

Answer: Electron.


54) A semiconductor one side of which is doped with a p-type impurity and the other side is doped with n-type impurity is called:

Answer: PN junction diode.


55) What is known as diffused junction?

Answer: The P.N junction obtained by diffusing impurity into the semiconductor crystal.


56) When the P region and N region of a P-N diode are connected to the negative and positive poles of the battery respectively it is said to be in:

Answer: Reverse biased.


57) The process of mixing the audio signals with high frequency carrier waves is called:

Answer: Modulation.


58) Which must have the proper size to match the impedance of the transmitter or receiver to that of space?

Answer: The antenna.


59) What is called the type of modulation in which the frequency of the carrier waves is altered in accordance with the audio signals?

Answer: Frequency modulation.


60) In amplitude modulation which of the carrier wave is changed in accordance with the sound pattern?

Answer: Amplitude.


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