SCIENCE AND MATH CONCEPTS

🔹 जब किसी चालक में विद्युत धारा प्रवाहित की जाती है , तो उसके चारों ओर एक चुंबकीय क्षेत्र उत्पन्न हो जाता है , इस घटना को विद्युत धारा का चुंबकीय प्रभाव कहते हैं । चुम्बक :- 🔹 चुम्बक वह पदार्थ है जो लौह तथा लौह युक्त चीजों को अपनी तरफ आकर्षित करती है । चुम्बक के गुण :- प्रत्येक चुम्बक के दो ध्रुव होते हैं – उत्तरी ध्रुव तथा दक्षिणी ध्रुव । समान ध्रुव एक – दूसरे को प्रतिकर्षित करते हैं । असमान ध्रुव एक – दूसरे को आकर्षित करते हैं । स्वतंत्र रूप से लटकाई हुई चुम्बक लगभग उत्तर – दक्षिण दिशा में रुकती है , उत्तरी ध्रुव उत्तर दिशा की और संकेत करते हुए । ❇️ चुम्बक के ध्रुव :- ;...... 🔹 प्रत्येक चुम्बक के दो ध्रुव होते हैं :- उत्तरी ध्रुव दक्षिणी ध्रुव 🔶 उत्तर ध्रुव :- उत्तर दिशा की ओर संकेत करने वाले सिरे को उत्तरोमुखी ध्रुव अथवा उत्तर ध्रुव कहते हैं । 🔶 दक्षिण ध्रुव :- दूसरा सिरा जो दक्षिण दिशा की ओर संकेत करता है उसे दक्षिणोमुखी ध्रुव अथवा दक्षिण ध्रुव कहते हैं । ❇️ चुम्बकीय क्षेत्र :-🔹 किसी चुंबक के चारों ओर का वह क्षेत्र जिसमें उसके बल का संसूचन किया जा सकता है , उस ...

Electrostatic Potential The electrostatic potential at any point in an electric field is equal to the amount of work done per unit positive test charge or in bringing the unit positive test charge from infinite to that point, against the electrostatic force without acceleration. Electrostatic potential is a state dependent function as electrostatic forces are conservative forces. 2. Electrostatic Potential Difference The electrostatic potential difference between two points in an electric field is defined as the amount of work done in moving a unit positive test charge from one point to the other point against of electrostatic force without any acceleration (i.e. the difference of electrostatic potentials of the two points in the electric field). where, is work done in taking charge q0 from A to B against of electrostatic force. Also, the line integral of electric field from initial position A to final position B along any path is termed as potential difference between two points in ...

Motion in a Straight Line Introduction Motion is one of the significant topics in physics. Everything in the universe moves. It might only be a small amount of movement and very-very slow, but movement does happen. Even if you appear to be standing still, the Earth is moving around the sun, and the sun is moving around our galaxy. “An object is said to be in motion if its position changes with time”. The concept of motion is a re’ live one and a body that may be in motion relative to one reference system, may be at rest relative to another. There are two branches in physics that examine the motion of an object. (i) Kinematics: It describes the motion of objects, without looking at the cause of the motion. (ii) Dynamics: It relates the motion of objects to the forces which cause them. • Point Object If the length covered by the objects are very large in comparison to the size of the objects, the objects are considered point objects. • Reference Systems The motion of a parti...

Invention/Discovery Name of the Inventor Year of Invention Automatic Calculator Wilhelm Schickard 1623 Air Conditioner Willis Carrier 1902 Anemometer Leon Battista Alberti 1450 Animation J. Stuart Blackton Atom Bomb Julius Robert Oppenheimer 1945 Aspirin Dr. Felix Hoffman 1899 Airplane Wilber and Orville Wright 1903 Adhesive tape Richard G. Drew 1923 Bifocal Lens Benjamin Franklin 1779 Barometer Evangelista Torricelli 1643 Barbed Wire Joseph F. Glidden 1873 Blood Group Karl Lansdsteiner 1900s Ball Point Pen John Loud — Bicycle Tyres John Boyd Dunlop 1888 Pedal Driven Bicycle Kirkpatrick Macmillan 1839 Celluloid Alexander Parkes 1861 Chloroform Sir James Young Simpson Cine Camera Wm. Friese-Greene 1889 Circulation of blood William Harvey 1628 Clock Mechanical Hsing and Ling-Tsan 1725 Diesel Engine Rudolf Diesel ...

What is an adjective? Adjectives are words that describe the qualities or states of being of nouns: enormous, doglike, silly, yellow, fun, fast. They can also describe the quantity of nouns: many, few, millions, eleven. Adjectives modify nouns Most students learn that adjectives are words that modify (describe) nouns. Adjectives do not modify verbs or adverbs or other adjectives. Margot wore a beautiful hat to the pie-eating contest. Furry dogs may overheat in the summertime. My cake should have sixteen candles. The scariest villain of all time is Darth Vader. In the sentences above, the adjectives are easy to spot because they come immediately before the nouns they modify. An adjective is a word that describes the traits, qualities, or number of a noun. Decide whether you have to use much or many: We saw _____ animals at the zoo. How _____ oranges did you put in the box? There isn’t _____ sugar in my coffee. I don’t have ______ friends. The old man hasn’t got _____ hair on his head...

Interjections An interjection is a word that expresses sudden feelings: Joy, grief, surprise, praise, anger etc. Examples: 1. Hello! How are you? 2. Hurrah! We have won the match. 3. Alas! My granny is dead! 4. Hush! The baby is asleep. 5. Hurrah! We have won the tennis match. 6. Oh! I forgot to tell you something. 7. Ah! What a pleasant surprise. 8. Oh God! I got such fright. 9. Bravo! Well done. Interjections and their Expressions: Interjection Expression Hurrah! Joy Oh dear! borrow Alas! Ah! Sorrow Ugh! disgust Oh! Wonder Good heavens! horror Interjection Expression Bravo! Praise for goodness sake! anger Fie! Hatred Hello! address My goodness! Surprise Wow! Happiness Match the following columns: Column-A Column-B Hurrah! Sorrow Oh! Happiness Hello! Wonder Wow! Joy Alas! Address Fill in the blanks: 1. _____! How can you behave like this? 2. ______! I have secured first position in the class. 3. ______! I have won a prize. 4. ______! Did you hear me? 5. _______! ...