List of top Questions asked in CBSE CLASS XII

With the help of diagram, explain basic construction and working principle of a transformer.
With the help of diagram, explain the working principle of capacitor start motor.
Draw a diagram showing resistance in an AC circuit and the voltage and current waveform.
With the help of a diagram, explain the working of a universal motor.
What are the advantages and disadvantages of Dynamometer wattmeter? Write the different types of Dynamometer wattmeters.
Explain the construction and working principle of a room cooler. Draw a diagram of internal structure of a room cooler.
What can we do to help prevent manual handling injuries in the workplace?
Write down the steps for entering a text box in the slide.
Briefly explain the importance of green jobs in different sectors of the economy.
Explain the characteristics and applications of DC compound motor.
What are the possible faults in electric mixer? How are they removed?
Self-motivation is significant in building one’s personality. Comment.
List out any four steps of Active listening.
Write the safety measure precautions of a transformer from the operational point of view.
Write the main components of immersion heater.
What are the barriers faced by an individual in becoming an effective entrepreneur?
The losses in an ideal transformer will be:
What is the function of Diode in a digital multimeter?
What is CPR in first aid?
When using electricity in a damp location must be used. (Insulation fault indicator/Ground fault circuit interrupter)
The electrolytic capacitor used in a capacitor start motor is a short duty type and guaranteed for operations per hour.
Universal motor is used in .
The advantage of three-phase induction motor is:
fitting of the heating element in the Geyser is preferred. (Horizontal/Vertical)
How will you perform earth fault test?