List of top Questions asked in CBSE CLASS XII

What is the full form of ONAN?
The upper bowl of electric mixer is made of which material?
Define frequency.
What is the use of induction-type energy meters?
Name any two types of single phase induction motors.
Which type of motor is used in room coolers?
Continuity of electrical circuit is checked by .
What does ( Ia ) indicate in the voltage equation of a DC motor? [ V = Eb + Ia Ra ]
The shape of a rotor is:
The peak energy stored in an RLC circuit divided by the average energy dissipated in the circuit per radian at resonance is called:
How many contactors does a star-delta motor starter require?
One BHP is equal to:
Write the full form of RWHS.
Write any two roles/functions of an entrepreneur.
Write the shortcut key which is used for ‘Select all’ option.
Ram has feelings of emptiness and abandonment. Name the type of personality disorder he has.
The type of personality disorder characterized by extreme professionalism, order and neatness is called
What is an adjective?
What are the possible problems that can occur at different subsections of cable TV?
Explain working, merits, demerits and application of moving coil microphone.
What are the precautions to be taken to prevent electric shock?
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.