List of top Questions asked in CBSE CLASS XII- 2026

Write two key features of HDTV.
What is the full form of PCB?
Intermediate Frequency (IF) amplifier in TV receiver is used as
________ is a kind of loudspeaker driver used for low frequency range.
An analog sound recorder contains a sampler. (True/False)
Laser beam is used:
On which principle does a moving coil microphone work?
In a magnetic tape recorder, the erase signal is a ________ signal.
Which of the following is not a part of carbon microphone?
In which of the following loudspeaker there is no diaphragm?
Frequency response of a microphone depends on nature of the metal diaphragm and the shape of the case. (True/False)
Write any two merits of piezoelectric microphone.
Which of the following is not a safety concern in a manufacturing industry?
Fire extinguishers used to extinguish electrical fires are labelled as Class ________.
What do you mean by occupational hygiene?
Impedance, in general, is the opposition to voltage. (True/False)
Which of the following is not a protective equipment?
Which view in a presentation application allows you to see all your slides at once?
What is self-awareness?
In which sector do green jobs contribute to the development and implementation of renewable energy sources?
Occupational diseases are generally caused by poor work or working conditions. (True/False)
A ________ is a company that is in the first stage of its operations.
The process of establishing a hazardous location or agent at the workplace is called
Begin working on electrical equipments only when they are energized. (True/False)
What is a Digital multimeter? Write its features and draw its schematic block diagram.