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NCERT  Solutions for Class 12 Sociology Chapter 2 The Demographic Structure of the Indian Society NCERT TEXTBOOK QUESTIONS SOLVED 1.Explain the basic argument of the theory of the demographic transition. Why is the transition period associated with a ‘population explosion’?Ans. Theory of demographic transition suggests that population growth in linked to overall levels of economic development … Read more

NCERT  Solutions for Class 12 Sociology Chapter 1 Introducing Indian Society NCERT TEXTBOOK QUESTIONS SOLVED 1.What are the main problems of national integration in India?Ans. The problems of India are linguistic identity, regionalism, demand for separate states and terrorism etc. create hindrances in the way of national integration. Due to these . problems, usually strikes, riots … Read more

Amplitude of Sound Frequency of Sound It is maximum displacement of a vibrating object from its central location Number of Vibrations made in one second is called frequency of sound It determines size of waves It measures number of waves per second It is measured in metre. It is measured in Hertz It measures how … Read more

Here are some examples of energy transformations taking place in our daily life Electric Motors This is used in different appliances like fans, refrigerators etc Here Electrical energy is converted into Kinetic Energy Electrical Energy → Kinetic Enrgy Electric Generator It is used to generate electricity Here, Mechanical Energy is converted into electrical energy Mechanical … Read more

A Transformer is a static electrical machine which transfers AC electrical power from one circuit to the other circuit at the constant frequency, but the voltage level can be altered that means voltage can be increased or decreased according to the requirement. It works on the principle of Faraday’s Law of Electromagnetic Induction which states that “ the magnitude … Read more