सरल रेखा में गति One Shot | Class 11 Physics Chapter 2 | Motion in A Straight Line | Board Exam 2026

Class 12 Physics (Hindi)| Chapter 3 धारा विद्युत् Part 2 | Important Questions | UP Boards

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Class 12 Physics (Hindi)| Chapter 2 स्थिर वैद्युत विभव तथा धारिता | Important Questions | UP Boards

50 students of class IX planned a visit to an old age home and to spend the whole day with its inmates. Each one prepared a cylinderical flower vase using card board to gift the inmates. The radius of cylinder is 4.2 cm and the height is 11.2 cm. What is the amount spent for purchasing the card board at the rate of 20 per 100m^(2) .

Fig. 2 (NCT). 6 shows x-t plot of one dismensional motion a particle. Is it correct to say from the graph that the particle moves in a straight line for t lt 0 and on a parabolic path form t gt 0 ? If not, suggest a suitable physical contxt for this graph.

A Physics teacher explains the concept of relative velocity to her students in class. She emphasises that when two bodies are moving in opposite directions, their relative velocity is sum of the velocities of the two. And when two bodies are moving in the same direction, their relative velocity is difference of the velocities of the two. Students are confused. The teacher then takes two balls one red and the other green. She says suppose red ball moves with a velocity 5 m//s and green ball moves with a velocity of 4 m//s from a common point, and along the same straight line. if red ball is moving to the right and green ball is moving to the left, then after 1 sec , red ball is at R' , where R R' = 5 m and green ball is at G' where G G' = 4 m , Figure. The distance between the two balls after 1 sec = G' R' G G' + R R' = (4 + 5) = 9 m . This is the magnitude of their realtive velocity. If both the balls are moving to the right, as shown in Figure. The distance between the two balls after sec = G' R' - G G' = 5 - 4 = 1 m . In that case, relative velocity = 1m//s . (a) Read the above passage and answer the following questions : (i) What value has the Physics teacher displayed ? (ii) What have the students picked up ? (iii) Give atleast one practical example of the concept.

The area of a triangle ABC is one unit. DE is a straight line parallel to BC , joining the points D and E on AB and AC respectively such that AD : DB = 1 : 6. The ratio of the areas of the triangles ADE and ABC is : एक त्रिभुज ABC का क्षेत्रफल 1 इकाई है | DE, BC के समानांतर एक सीधी रेखा है जो क्रमशः AB और AC पर स्थित बिंदु D तथा E को इस प्रकार जोड़ती है कि AD : DB = 1 : 6 है | त्रिभुज ADE और ABC के क्षेत्रफल में अनुपात ज्ञात करें |

Festival season is going in Agrabah and the people are going crazy to see various sorcerers, craftsmen etc. who are visiting the city to showcase their magic. A large crowd has gathered around a Card-master who is asking a logical riddle to the crowd. Whosoever succeeds in solving the riddle gets a reward. He arranges the cards of first 20 natural numbers and lists down the difference between two consecutive numbers (value on right card minus value on the left card) of the arrangement, which are 19 in number. The difference is given as -11 8 -7 -2 11 -4 12 -15 11 3 -13 9 -1 -3 6 -10 -3 5 9 The city is beautifully lightened up with candles and diyas and the vibes of happiness and joy were coming from all the directions. Aladdin and Abu are also enjoying the festival when they find a very interesting game of balloons. Inflated balloons are arranged in a straight line and are marked with English Upper case letters. The player can perform the following action any number of times (including zero): Choose any one of the balloons from the straight line and replace the letter on it with any other Uppercase English letter. Note that even if the replaced letter occurs S multiple times, only the chosen occur- rence of this letter is replaced. Find the sum of the minimum number of operations required to convert the given balloon line to balanced ones. Let's call a balloon line balanced if all characters that occur in this balloon line occur the same number of times. Line 1: ABAAACDHIAACKIOA (16 letters) Line 2: BBCABCDFAHABNAJHDYWGEJA (23 letters) Line 3: ABSDJAHSABDJAMDHANDHASAKIABCHD (30 letters)