List of top Questions asked in CBSE CLASS XII

Explain working, merits, demerits and application of moving coil microphone.
What are the possible problems that can occur at different subsections of cable TV?
What is an adjective?
The type of personality disorder characterized by extreme professionalism, order and neatness is called
Write any two roles and functions of entrepreneurship.
Write any four steps that green jobs perform to reduce greenhouse gas emissions.
Explain the process of scrambling.
Write a short note on Tweeter.
What is the function of DC Biasing?
What are the faults which may occur in scanners?
Write a short note on occupational hazards.
What is a loudspeaker? Write names of different types of loudspeakers.
Explain the working and features of remote control of TV receiver.
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:
______________________________ 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 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)
A varactor diode is used in________________________ stage of a TV receiver.
Which of the following is not a feature of HDTV?
The process by which the information is modified with the help of locally generated carriers is called ___________.
(Scrambling / Modulation)