IIT JEE प्रश्न और उत्तर का अभ्यास करें
8प्र: Friction can be reduced by changing from 1957 05b5cc6b6e4d2b4197774d593
5b5cc6b6e4d2b4197774d593- 1Static to Dynamicfalse
- 2Rolling to Slidingfalse
- 3Dynamic to Staticfalse
- 4Sliding to Rollingtrue
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उत्तर : 4. "Sliding to Rolling"
व्याख्या :
Answer: D) Sliding to Rolling Explanation: Any object rolls when there is no friction. So, Sliding to Rolling is correct.
प्र: Which one of the following is a natural colloid ? 1957 05b5cc6cee4d2b4197774e26f
5b5cc6cee4d2b4197774e26f- 1Cane sugar solutionfalse
- 2Bloodtrue
- 3Sodium chloride solutionfalse
- 4Urea solutionfalse
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उत्तर : 2. "Blood"
व्याख्या :
Answer: B) Blood Explanation:
प्र: Read each part of the sentence to find out if there is any error in it. The error, if any, will be in one part of the sentence. The number of that part is the answer. As much as i admire him for his talent(1) / and endeavor to achieve success(2)/ I cannot forgive him for being so(3)/rude to the not so well to do ones(4) 1956 05b5cc6cae4d2b4197774e0a4
5b5cc6cae4d2b4197774e0a4- 1(1)true
- 2(2)false
- 3(3)false
- 4(4)false
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उत्तर : 1. "(1)"
व्याख्या :
Answer: A) (1) Explanation: The error lies in part (1). As the phrase 'as much as' needs to be replaced with 'much as I'. This is because we use 'as much as' for comparing two qualities or things. But here in the given sentence a contrast is given in the latter part of the sentence. So we need a conjunction like 'even though' 'although' etc... 'Much as I' also serves the same purpose.
प्र: The Rain Shadow Effect is associated with 1955 15b5cc6b9e4d2b4197774d716
5b5cc6b9e4d2b4197774d716- 1Convectional rainfallfalse
- 2Frontal rainfallfalse
- 3Cyclonic rainfallfalse
- 4Orographic rainfalltrue
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उत्तर : 4. "Orographic rainfall"
व्याख्या :
Answer: D) Orographic rainfall Explanation: Orographic precipitation or Rain produced when moist air is lifted as it moves over a mountain range. As the air rises and cools, orographic clouds form and serve as the source of the precipitation, most of which falls upwind of the mountain ridge. Some also falls a short distance downwind of the ridge and is sometimes called spillover. On the lee side of the mountain range, rainfall is usually low, and the area is said to be in a Rain Shadow.
प्र: A quantity of tea is sold at Rs. 5.75 per kilogram. The total gain by selling the tea at this rate is Rs. 60. Find the quantity of tea being sold if a profit of 15% is made on the deal ? 1955 05b5cc70ee4d2b4197774f332
5b5cc70ee4d2b4197774f332- 172 kgsfalse
- 280 kgstrue
- 376 kgsfalse
- 484 kgsfalse
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उत्तर : 2. "80 kgs"
व्याख्या :
Answer: B) 80 kgs Explanation: Say total cost price of tea is x.Then total profit at a rate of 15% is = (15x/100)According to question,15x/100 = 60so x = 400C.p of the tea is Rs. 400.so total selling price will be = (400+60) = Rs.460so the quantity of the tea will be = (460/5.75) = 80kg.
प्र: A girl want to read a complete book. She read 2/5 part of a book on 1st day, 34% on second day and remaining pages in next two days. On those two days she read equal number of pages. If she read 52 pages on last day, then find out total number of pages that the book contain ? 1955 05b5cc6cbe4d2b4197774e108
5b5cc6cbe4d2b4197774e108- 1400true
- 2525false
- 3325false
- 4475false
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उत्तर : 1. "400"
व्याख्या :
Answer: A) 400 Explanation: Let the total number of pages in the book be 'x'. From given data, 2x/5 + 34x/100 + 52 + 52 = x => 40x + 34x + 10400 = 100x => 26x = 10400 => x = 400. Hence, total pages in the book are 400.
प्र: An Engine length 1000 m moving at 10 m/s. A bird is flying from engine to end with 'x' m/s and coming back at '2x' m/s. Take total time of bird travelling as 187.5 s. Find x and 2x in km/hr ? 1954 05b5cc73de4d2b4197774f911
5b5cc73de4d2b4197774f911- 121.4 and 42.8false
- 225.2 and 50.4false
- 331.4208 and 62.8416true
- 433.12 and 66.24false
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उत्तर : 3. "31.4208 and 62.8416"
व्याख्या :
Answer: C) 31.4208 and 62.8416 Explanation: Birds speeds in mtrs/sec is 'x' and '2x' .While flying from Engine to end, relative speed = (x+10) m/secfrom end to engine, flying speed = (2x - 10) mtr/secso 1000/(x+10) + 1000/(2x-10) = 187.5 secssolving it, we getso x = 8.728 m/sec and 2x= 17.456 m/sec x = 31.4208 km/hr and 2x = 62.8416 km/hr.
प्र: " International Yoga Day " is observed on _____ ? 1954 05b5cc6d5e4d2b4197774e5e3
5b5cc6d5e4d2b4197774e5e3- 121 Mayfalse
- 221 Junetrue
- 311 Junefalse
- 423 Mayfalse
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उत्तर : 2. "21 June"
व्याख्या :
Answer: B) 21 June Explanation: June 21St has been declared as the "International Yoga Day" by the United Nations General Assembly on December 11, 2014. The declaration came after the call for adoption of this day by Indian Prime Minister Narendra Modi during his address to UN General Assembly on September 27, 2014. 21st June, 2017 is the 3rd International Yoga Day.