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UNIT-1 PHYSICAL WORLD & MEASUREMENT Class 11 Physics MCQ Questions

 1. Which of the following is not the unit of distance? (a) Light year (b) Astronomical Unit (c) Parsec (d) Millisecond  2. The dimensional formula for ω in the relation y = A Sin ωt is (a) [M° L° T] (b) [M° L° T–1] (c) [ML° T°] (d) [M° L–1 T–1]  3. Dimensional formula for curie is (a) [M° L T–1] (b) [M° L–1 T°] (c) [M° L° T–1] (d) [M–1 L° T°]  4. Which of the following pairs of physical quantities does not have same dimensional formula. (a) Work and torque (b) Angular momentum and Planck's constant (c) Tension and surface tension (d) Impulse and linear momentum  5. If momentum (p), Area (A) and time (T) are takes as fundamental quantities, then energy has the dimensional formula : (a) [ p A½ T–1 ] (b) [ p A–½ T1 ] (c) [ p2 A T ] (d) [ p A–1 T ]  6. Out of 4.0 and 4.00, which is more accurate? (a) 4.0 (b) 4.00 (c) Both are equally accurate (d) Nothing can be said  7. The speed (v) of sound in a gas is given by v = k Px ρy Where K is dimensionless constant, P is pressure, and ρ is
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The Tale of Custard the Dragon Poem By Ogden Nash Summary: CBSE Class 10 English First Flight

  Summary:सारांश This poem is a humorous ballad that presents a piece of writing in a funny way. A little girl Belinda is described in this poem, with many pets whom she had named. She has named the black kitten as Ink, grey mouse as Blink, yellow dog as Mustard and a coward dragon as Custard. The poet has beautifully described all these characters in the poem. He says that all of them are very brave except the dragon. But his perception changes when the dragon saves everyone from the attack of pirates on Belinda’s house. यह कविता एक हास्यपूर्ण गाथागीत है जो मजाकिया अंदाज में लेखन का एक अंश प्रस्तुत करता है। इस कविता में एक छोटी लड़की बेलिंडा का वर्णन किया गया है, जिसके कई पालतू जानवर हैं, जिनका उसने नाम रखा था। उसने काली बिल्ली के बच्चे को इंक, ग्रे माउस को ब्लिंक, पीले कुत्ते को मस्टर्ड और कस्टर्ड ड्रैगन को कस्टर्ड नाम दिया है। कवि ने कविता में इन सभी पात्रों का सुंदर वर्णन किया है। वह कहता है कि अजगर को छोड़कर सभी बहुत बहादुर हैं। लेकिन उनकी धारणा तब बदल जाती है जब ड्रैगन बेलिंडा के

Animals Poem By Walt Whitman Summary : CBSE Class 10 English First Flight

  Summary:सारांश Through this poem “Animals”, the poet says that animals are far better than human beings. The poet feels more comfortable with animals and wants to live with them instead of humans. In the entire poem, he draws a comparison between animals and humans. He has pointed out the evil and negative side of human beings, which he feels that animals do not possess. That’s why the poet feels more at home with animals. इस कविता "पशु" के माध्यम से, कवि कहता है कि जानवर इंसानों से कहीं बेहतर हैं। कवि जानवरों के साथ अधिक सहज महसूस करता है और मनुष्यों के बजाय उनके साथ रहना चाहता है। पूरी कविता में, वह जानवरों और मनुष्यों के बीच तुलना करता है। उन्होंने मनुष्य के बुरे और नकारात्मक पक्ष को इंगित किया है, जो उसे लगता है कि जानवरों के पास नहीं है। इसलिए कवि जानवरों के साथ घर पर अधिक महसूस करता है। Animals Poem Explanation:पशु कविता व्याख्या I think I could turn and live with animals, they are so placid and self-contain’d, I stand and look at them long and long. They do not sweat

Amanda! Poem Summary: CBSE Class 10 English First Flight

  Summary:सारांश The poem is about a little girl, Amanda, who is constantly pointed out by her mother for making mistakes. Robin Klein has beautifully expressed the girl’s feelings in the poem about how she is controlled and instructed by her mother for small things. The poem conveys an important message that children should never be deprived of their freedom. They should not feel that for every small thing they do, their parents constantly nag them. It’s the responsibility of the parents to bring up their children in such a way that they understand their viewpoint instead of getting frustrated. Children should not feel that an orphan has more freedom than them. कविता एक छोटी लड़की, अमांडा के बारे में है, जिसे उसकी मां ने लगातार गलतियाँ करने के लिए कहा है। रॉबिन क्लेन ने कविता में लड़की की भावनाओं को खूबसूरती से व्यक्त किया है कि कैसे उसे छोटी-छोटी चीजों के लिए उसकी मां द्वारा नियंत्रित और निर्देश दिया जाता है। कविता एक महत्वपूर्ण संदेश देती है कि बच्चों को उनकी स्वतंत्रता से कभी वंचित