List of top Questions asked in CBSE CLASS XII- 2026

The voltage transformer is also known as ________. (Air core transformer Potential transformer)
Eddy current in dynamometer type wattmeter can be minimised by using ________ within the region of magnetic field. (Metallic parts Non-metallic parts)
Torque and armature current characteristics are known as ________ characteristics. (Electrical Mechanical)
The speed of motor or blower of room cooler is controlled by ________. (Selector switch Toggle switch)
Series testing leads are connected to the terminals of plug top of the water heater. The lamp is not glowing. This indicates ________. (Short circuit Open circuit)
Universal motor works only with DC supply.
In DC motor, flux is directly proportional to armature current.
Switch on power supply while working with the transformer.
The electromagnet is the main component of driving system of energy meter.
Three-phase induction motor works on the principle of ________. (Self-induction Mutual induction)
Capacitor is always connected in series with starting winding.
Squirrel cage induction motor is cheaper than slip ring motor.
How is the starting torque of an induction motor improved?
What is the other name for pressure type water heater?
First aid for an electric shock victim is:
Define Lenz's law.
What do you mean by Probes?
How will you perform open circuit test?
What do you mean by one cycle of a wave?
What is the recommended distance for connecting capacitors from soft starters?
The power rating of element used in electric geysers is between
What does $R_a$ indicate in the voltage equation $V=E_{b}+I_{a}R_{a}$ of DC motor?}
Natural air cooling is used in transformers with ratings up to
Megger is used to measure ________.
Capacitor that is used in capacitor start motor is: