List of top Questions asked in CBSE CLASS XII

“Stress is a natural response to challenges or demands.” Write any four ways to manage stress.
________ separates video signal from composite signal.
The mixer of a TV receiver is a/an ________ port device.
In DTMF, the circuit operates over the supply voltage range from
The tone ringer unit in telephone generates frequency in the ________ range.
There are ________ number of pins in RJ11 connector.
Which of the following is an impact printer?
What do you mean by playback?
Which of the following can be used for analog sound recording?
Intermediate Frequency (IF) amplifier in TV receiver is used as
What is the full form of PCB?
Frequency modulation is done in ________ section of the TV transmitter. (Audio/Video)
High power linear amplifier is used in the audio section of the TV transmitter. (True/False)
Write two key features of HDTV.
In which of the following loudspeaker there is no diaphragm?
On which principle does a moving coil microphone work?
Which of the following is not a part of carbon microphone?
________ is a kind of loudspeaker driver used for low frequency range.
An analog sound recorder contains a sampler. (True/False)
Laser beam is used:
In a magnetic tape recorder, the erase signal is a ________ signal.
Fire extinguishers used to extinguish electrical fires are labelled as Class ________.
Which of the following is not a safety concern in a manufacturing industry?
Write any two merits of piezoelectric microphone.
Frequency response of a microphone depends on nature of the metal diaphragm and the shape of the case. (True/False)