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CLASS 12TH PHYSICS EXPERIMENT To find the value of v for different values of u in case of a concave mirror and to find the focal length.

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To find the value of v for different values of u in case of a concave mirror and to find the focal length. Apparatus : Optical bench,concave mirror, optical needle,a meter scale. Theory: By Mirror formula , 1/f=1/v+1/u, f=uv/(u+v), where, u = distance of object from the pole of mirror v =  distance of image from the pole of mirror    f = focal length of concave mirror Ray diagram of concave mirror Procedure:  1 Take given concave mirror and turn its reflecting surface toward a distant object to obtain image on a sheet of note book. 2 Measure the distance between mirror and image formed on the sheet. This is the rough focal length of concave mirror. 3 Clamp mirror holder in one upright and fix two optical needles in two uprights on the optical bench. Place them close to each other at one end of optical bench. Adjust their heights so that tips of the needles are at the same height as the center of the mirror. Pierce a small piece of paper into the tip of the n
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CBSE CLASS X SCIENCE CHAPTER ELECTRICITY LESSON PLAN 1

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CBSE CLASS X SCIENCE LESSON PLAN LESSON PLAN 1 CHAPTER 12 ELECTRICITY CBSE CLASS X SCIENCE e-LESSON PLAN CHAPTER ELECTRICITY BOARD: CBSE CLASS: 10TH (X) SUBJECT: SCIENCE THEME: PHYSICS ( HOW THINGS WORK) UNIT : EFFECTS OF CURRENT CHAPTER: ELECTRICITY TOPIC : ELECTRIC CURRENT AND CIRCUITS PRE-REQUISITE KNOWLEDGE: Metal and Non-metal, concept of conductor and insulators, Structure of atom, concept of electrons, methods of charging etc. CBSE CLASS X SCIENCE LESSON PLAN CHAPTER ELECTRICITY TEACHING AIDS:  In addition to general teaching tools like Green Board, chalk, duster, white board, marker of different color, smart class, etc the teacher will use Electric devices like Ammeter, Voltmeter, Electric cell, battery , wire , plug key, etc. The References used will be:  Text book NCERT Science class X University Physics etc. METHODOLOGY (PEDAGOGY): Demonstration cum lecture method. Activity based teaching in which active participation of
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Branches of Science

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Science is broadly classified into two categories:  Natural Sciences or Real Science                                        Social Science Natural Science is the branch of science which deals with the study of universe (living organisms and non living systems) each and every thing.The law and theories in natural science does not change with place,people and time.So, its a study of  unchanged reality. Example : If an experiment is performed(correctly and accurately) by me or you its result does not change. Social Science is the systematic study of human behaviour and society. It is changing reality. Example: Economy of different countries is different. Initially, Science is studied under Philosophy .  But with the passage of time, as the man acquired more knowledge and experiment to validate facts(philosophy) science is considered as separate subject. In universe subject matter of Natural Science (Real Science) is studied  under two categories Living Organism and
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