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General Electronics Questions and Answers

Top 50 Electronics Questions and Answers


Electronics Basic General Knowledge Questions and Answers


General Electronics Questions and Answers Part 1 (Questions 1-15)


1) The receiving antenna intercepts a portion of this wave. Which wave?

Answer: Radiated.


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

Answer: Rectification.


3) A radio demodulates the information contained in the:

Answer: Radio waves.


4) What is oscillation?

Answer: It is a process of conversion of D.C into a signal of the desired frequency.


5) Which selects and amplifies the desired transmitted signal?

Answer: Radio receiver.


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

Answer: Transistor.


7) Which are the three most important characteristics of a radio receiver?

Answer: Sensitivity, selectivity, and fidelity.


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

Answer: Control grid.


9) Which performs to the ability of a radio receiver to detect weak signals?

Answer: Sensitivity.


10) The thermionic valve named triode has _?

Answer: 3 electrodes.


11) Which pertains to the ability of a radio receiver to exactly reproduce the original information?

Answer: Fidelity.


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

Answer: Boron.


13) Which receiver converts all incoming frequencies into a fixed frequency?

Answer: Superheterodyne.


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

Answer: Free electrons.


15) Which pertains to the ability of a receiver to receive the tuned frequency in exclusion of other frequencies?

Answer: Selectivity.


Online Electronics General Quiz Questions Part 2 (Questions 16-30)


16) Example of a donor is?

Answer: Antimony.


17) At the input of the receiver, along with the genuine signals, there is always some:

Answer: Noise.


18) The hole is considered as?

Answer: Equivalent of a positive charge.


19) Which converts the demodulated electrical waves into sound waves?

Answer: Loudspeaker.


20) Detection is a kind of _?

Answer: Rectification.


21) Which controls the radio waves in accordance with the information to be transmitted?

Answer: Telegraph Key.


22) The middle region of the transistor is known as?

Answer: Base.


23) This consists of periodic interruptions of continuous radio waves in accordance with a telegraphic code. Name it:

Answer: Radiotelegraphy.


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

Answer: Electrons.


25) This consists of modulation of radio waves by speech or music. Name it:

Answer: Radiotelephony.


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

Answer: Oscillation.


27) Which converts sound energy into electric energy?

Answer: Microphone.


28) Greatly facilitated radio communications:

Answer: Triode.


29) Who verified the existence of radio waves in 1887?

Answer: Heinrich Hertz.


30) Who succeeded in spanning the Atlantic with the letter S of the Morse code?

Answer: Guglielmo Marconi.


General Electronics Questions Part 3 (Questions 31-50)


31) What generates the radio frequency waves?

Answer: Radio transmitter.


32) Which keying of the power amplifier is a popular method of keying?

Answer: Plate circuit keying.


33) Several intermediate amplifiers are inserted between the oscillator and the final power amplifier when:

Answer: High output power is required.


34) Which microphone is based on the piezoelectric effect?

Answer: Crystal.


35) What are the distinguishing marks of a microphone?

Answer: Their output and range of frequency response.


36) Which is the process of modifying the amplitude of an rf carrier in accordance with the strength of the audio signal?

Answer: Amplitude modulation.


37) Crystals cannot be obtained that will oscillate well in this band. Which band?

Answer: VHF.


38) A microphone frequency response from 20 to 1500 hz is necessary for this broadcasting. Name it:

Answer: FM.


39) Which changes the amplitude variations of an audio signal into corresponding phase or frequency variations?

Answer: The resistance tube modulator.


40) Which antenna radiates wave into space?

Answer: Transmitting.


41) Which antenna intercepts a portion of the radiated waves?

Answer: Receiving.


42) Who predicted the Existence of electromagnetic waves?

Answer: Clerk Maxwell in 1865.


43) Which electric charges always radiate energy in the form of electromagnetic waves?

Answer: Accelerated.


44) What do we need to radiate or receive electromagnetic waves effectively?

Answer: Antenna.


45) This is a system of elevated conductors, which matches the transmitter or receiver to space. Name it:

Answer: An antenna.


46) The electrical length of a Hertz antenna is a half:

Answer: Wavelength.


47) If the plane of the electric field is horizontal with respect to the earth, the wave is said to be:

Answer: Horizontally polarised.


48) If the electric field is oriented vertically with respect to the earth, the wave is said to be:

Answer: Vertically polarized.


49) Which is primarily a function of’ the antenna orientation?

Answer: The wave polarization.


50) The voltage induced in the receiving antenna is of the same waveform as the:

Answer: Radio waves.


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