List of top Electrical Technology Questions asked in CBSE CLASS XII

Eddy current in dynamometer type wattmeter can be minimised by using ________ within the region of magnetic field. (Metallic parts Non-metallic parts)
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)
The voltage transformer is also known as ________. (Air core transformer Potential transformer)
Switch on power supply while working with the transformer.
The electromagnet is the main component of driving system of energy meter.
Squirrel cage induction motor is cheaper than slip ring motor.
In DC motor, flux is directly proportional to armature current.
Capacitor is always connected in series with starting winding.
Three-phase induction motor works on the principle of ________. (Self-induction Mutual induction)
Universal motor works only with DC supply.
What do you mean by Probes?
How will you perform open circuit test?
What is the other name for pressure type water heater?
First aid for an electric shock victim is:
How is the starting torque of an induction motor improved?
What is the recommended distance for connecting capacitors from soft starters?
Define Lenz's law.
What do you mean by one cycle of a wave?
Megger is used to measure ________.
The power rating of element used in electric geysers is between
Natural air cooling is used in transformers with ratings up to
Capacitor that is used in capacitor start motor is:
DC shunt motor is used in
What does $R_a$ indicate in the voltage equation $V=E_{b}+I_{a}R_{a}$ of DC motor?}