List of top Electronics Technology Questions asked in CBSE Class Twelve Board Exam

With the help of a block diagram, explain the working principle of disc recording system.
Write some general causes of failure of recorder/player.
Explain the working principle of microwave oven.
What are the precautions to be taken to prevent electric shock?
What are the possible problems that can occur at different subsections of cable TV?
Explain working, merits, demerits and application of moving coil microphone.
Explain the process of scrambling.
Write any two roles and functions of entrepreneurship.
Write a short note on occupational hazards.
Explain the working and features of remote control of TV receiver.
Write a short note on Tweeter.
What is a loudspeaker? Write names of different types of loudspeakers.
Write any four steps that green jobs perform to reduce greenhouse gas emissions.
What are the faults which may occur in scanners?
What is the function of DC Biasing?
______________________________ is referred to as ‘heart’ of the image formation system in a printer.
How can you acquire good listening skills?
Why is self-motivation important?
How do you select a range of cells in a spreadsheet?
The device used in microwave oven to match power between source and load is called circulator. (True/False)
In which year was the telephone invented?
In a FAX machine if the printed image is dirty, then:
Scanner is used to transfer images into digital form. (True/False)
The picture tube of a TV receiver is known as_____________________.
(Visual tube / Cathode ray tube)
FM modulator is used in_____________________ section of a TV transmitter.
(Audio / Video)