List of top Electronics Technology Questions on Electronics asked in CBSE CLASS XII

Draw a labelled diagram of cathode ray tube.

Draw a block diagram of a microwave oven.

Write some general causes of failure of TV receiver.

Write the features of a remote control.

Which of the following devices can be used for microwave generation?

In DTMF, the circuit operates over the supply voltage range from

________ separates video signal from composite signal.

The mixer of a TV receiver is a/an ________ port device.

What is the full form of PCB?

High power linear amplifier is used in the audio section of the TV transmitter. (True/False)

Frequency modulation is done in ________ section of the TV transmitter. (Audio/Video)

Write two key features of HDTV.

Intermediate Frequency (IF) amplifier in TV receiver is used as

Impedance, in general, is the opposition to voltage. (True/False)

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 working principle of microwave oven.

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 and features of remote control of TV receiver.

What is a loudspeaker? Write names of different types of loudspeakers.

What is the function of DC Biasing?

Write a short note on Tweeter.

Explain the process of scrambling.

______________________________ is referred to as ‘heart’ of the image formation system in a printer.