NARAYANKAR NOTES

  Wave Physics Q&A Wave Physics Questions and Answers 1. What is wave ? Ans.: Wave is a periodic and regular disturbance of energy and momentum from one point of the medium to another without any flow of material of medium. 2. What do you mean by electromagnetic waves ? Ans.: Electromagnetic waves are generated due to periodic vibrations in electric and magnetic fields. 3. What do you mean by matter waves ? (1 mark) Ans. The waves always associated with any object in motion are called matter waves. 4. What are mechanical waves . State its examples. (2 marks) Ans.: (i) Waves which require material medium for their propagation are called mechanical waves. (ii) Water waves , sound waves , seismic waves and waves along a stretched string are some of the examples of mechanical waves. 5. What are travelling or progressive wave? Name the types of progressive wave? (2 marks) Ans.: ...

Question: Write an application to the Principal requesting him/her to grant five days’ leave. To, The Principal Shivaji Vidyalaya English Primary School Kurla (West) Subject: Application for five days’ leave Respected Madam, With due respect, I would like to inform you that I am a student of your reputed school . I would like to inform you that my uncle’s marriage is going to be held on 2nd January 2026. Due to this reason, my family is going to our village. Therefore, I will be unable to attend my classes from 02/01/2026 for five days. I kindly request you to please grant me five days’ leave. Thanking you. Yours obediently, Name: ________ Class: V Division: B Roll No.: ________ Date: ________

INTRODUCTION In English grammar, verbs are very important because they show action, state, or condition. Along with main verbs, English also uses special verbs called helping verbs. Modal auxiliary verbs are a special type of helping verbs. They help the main verb to express ideas like ability, permission, possibility, necessity, obligation, advice, and intention. PART 1: HELPING VERBS (AUXILIARY VERBS) DEFINITION OF HELPING VERBS Helping verbs are verbs that help the main verb to form tense, voice, mood, or emphasis. They do not show action alone. They always come before the main verb. MAIN HELPING VERBS IN ENGLISH There are three primary helping verbs in English: Be Have Do These verbs change their form according to tense and subject. BE – FORMS AND USES Forms of “Be”: am, is, are (present) was, were (past) being (continuous) been (perfect) Uses of “Be”: a) To form continuous (progressive) tense Example: She is reading a book. They were playing football. b) To form passive voice Exam...

  Sociology Solved Paper (2023) Sociology - Solved Paper (2023) Subject Code: BLS LLB SEM III | Set II Q.1 Multiple Choice Questions 1. First stage of evolution of an institution: b) Ideology 2. Criterion of social development through social division of labour: b) Emile Durkheim 3. Result of Westernization and modernization: c) Social mobility 4. Social stratification and notions of purity/pollution: a) Caste System 5. Development of the 'Self': b) Charles Horton Cooley (Looking Glass Self) 6. Sociology of law studies: b) Criminology and penology 7. Jajmani system is a feature of: d) Caste system 8. Child marriage act amendment (1978) raised age to: 18 for girls and 21 for boys. 9. Father of Sociology: a) Auguste Comte 10. Process by which people act and react in relation to others: b) Social interaction 11. Small social group whose members share personal and lasting relationships: a) Primary Group ...

  Sociology Solved Paper (2024) Sociology - Solved Exam Paper (2024) Paper Code: 66832 | Date: 20/01/2024 Q.1 Answer in one or two sentences (Any 6) a) Polarization Polarization refers to the process where the social structure breaks down into two contrasting and hostile groups, specifically the Bourgeoisie and the Proletariat in Marxian theory. It signifies a widening gap between the social classes, leading to increased conflict. b) Comte's law of three stages Auguste Comte proposed that human thought and society evolve through three stages: the Theological (supernatural), the Metaphysical (abstract), and the Positive (scientific). c) Accommodation and Association Association: A group of people organized for a specific purpose or interest, such as a trade union or a club. Accommodation: A social process where individuals or groups adjust their behavior to avoid conflict and reach a state of peaceful coexistence. d) Purushart...

  Sociology Solved Paper (2025) Sociology - Solved Exam Paper (2025) Paper Code: 66832 | Date: 04/12/2024 Q.1 Answer in one or two sentences (Any 6) 1) Ascribed and Achieved Status Ascribed Status: A social position assigned at birth or involuntarily later in life, such as race, sex, or age. Achieved Status: A social position acquired on the basis of merit, effort, or choice, such as being a doctor, lawyer, or Olympic athlete. 2) Formal and Informal Group Formal Group: A group created by an organization to achieve specific goals, characterized by structured roles and rules (e.g., a corporate department). Informal Group: A group formed naturally based on shared interests or friendships without a rigid structure (e.g., a group of friends who have lunch together). 3) Verbal and Non-Verbal Communication Verbal Communication: The use of sounds and words to express oneself, encompassing both spoken and written language. Non-Verbal ...

  Sociology Solved Paper (2020) Sociology - Solved Exam Paper (2020) Paper Code: 68102 | Date: 08/01/2020 Q.1 Answer in brief a) Sociology [span_0](start_span) Sociology is the systematic and scientific study of human society, social behavior, and social groups[span_0](end_span). It was coined by Auguste Comte, often referred to as the "Father of Sociology." It examines the structure, development, and functioning of human society, including institutions like family, religion, and crime. The discipline seeks to understand the connections between individual behavior and the wider social forces shaping it. b) Ethnocentrism [span_1](start_span) Ethnocentrism is the tendency to evaluate other cultures according to the standards and customs of one's own culture[span_1](end_span). It involves the belief that one's own ethnic group or culture is superior to others. While it can promote social cohesion and patriotism within ...