List of top Questions asked in CBSE CLASS XII- 2026

Explain in brief the different types of cooling systems used for transformers.

Write any two precautions to be taken while using an immersion heater.

Explain the construction, working, and uses of a capacitor-start capacitor-run single-phase induction motor.

Write the steps to protect a spreadsheet with a password.

List the importance of positive thinking in life.

Write one sentence of each type --- Statement, Question, Exclamatory, Order.

List some ways by which one can reduce the amount of waste generated.

Mention general characteristics of DC shunt motor and its applications.

What do you understand by organisational skills? Which organisational skills help an entrepreneur to become successful?

Stator of three-phase induction motor is made by

In a series RLC circuit, R indicates:

The efficiency of single-phase motor as compared to three-phase motor is:

Which transformer is known as a single winding transformer?

Star delta motor starters are used for ________ motors.

Speed of motor used in electric mixer has ________ RPM.

Eddy current in dynamometer type wattmeter can be minimised by using ________ within the region of magnetic field. (Metallic parts Non-metallic parts)

The voltage transformer is also known as ________. (Air core transformer Potential transformer)

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 speed of motor or blower of room cooler is controlled by ________. (Selector switch Toggle switch)

Torque and armature current characteristics are known as ________ characteristics. (Electrical Mechanical)

Capacitor is always connected in series with starting winding.

The electromagnet is the main component of driving system of energy meter.

Switch on power supply while working with the transformer.

Squirrel cage induction motor is cheaper than slip ring motor.

Three-phase induction motor works on the principle of ________. (Self-induction Mutual induction)