Basic Electronics GK Questions 2018 – Electronic Test Quizzes


Basic Electronics GK Questions 2018 – Electronic Test Quizzes


Basic Electronics GK Questions 2018 - Electronic Test Quizzes


1. For producing high frequency carrier wave we use:

Answer: Oscillator.


2. The vacuum tubes (valves) were discovered by:

Answer: Lee de Forest.


3. 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.


4. Which is the main part of a tuner in the radio receiver?

Answer: Variable condenser.


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

Answer: Tuning.


6. 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.


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

Answer: Electron gun.


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

Answer: 1/25 second.


9. The rays starting from the cathode discharge tube are called:

Answer: Cathode rays.


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

Answer: William Crookes.


11. The unit used to express wave length is:

Answer: Angstrom.


12. The value of capacitor is expressed in the unit:

Answer: Farad.


13. The waves used in radar can be considered to be:

Answer: Micro waves.


14. Image orthicon is a kind of:

Answer: Pick up tube.


15. Who invented the tunnel diode?

Answer: Leo Esaki.


Top Electronics Exam Questions


16. The simplest type of valve is called:

Answer: Diode.


17. The valve having three electrodes is known as:

Answer: Triode.


18. Substances like glass, mica and rubber are called:

Answer: Insulators.


19. In the pure state the semiconductors are known as what?

Answer: Intrinsic.


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

Answer: Extrinsic.


21. If a silicon crystal is doped with an element of group five it becomes:

Answer: N-type semiconductor.


22. The impurity used to make p-type semiconductor is:

Answer: Boron or gallium or indium.


23. The majority carriers in n-type semiconductor is:

Answer: Electron.


24. 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.


25. What is known as diffused junction?

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


26. 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.


27. The process of mixing the audio signals with high frequency carrier waves is called:

Answer: Modulation.


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

Answer: The antenna.


29. 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.


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

Answer: Amplitude.


Read Common Computer Competitive Exam GK Quiz Questions 2018 > Mathematics Around us – GK Quiz

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