Class 10th Questions and Answers

                    Ncert Class 10th Science                Light Reflection and Refraction                        Shiva Valley School   Question and Answers Question 1: Define the principal focus of a concave mirror. Answer: Light rays that are parallel to the principal axis of a concave mirror converge at a specific point on its principal axis after reflecting from the mirror. This point is known as the principal focus of the concave mirror. Question 2: The radius of curvature of a spherical mirror is 20 cm. What is its focal length?  Answer: Radius of curvature, R= 20 cm Radius of curvature of a spherical mirror = 2 x Focal length (R = 2f R 20 1=22 =10 cm Hence, the focal length of the given spherical mirror is 10 cm. Question 3: Name the mirror that can give an erect and enlarged image of an object. Answer: When an object is placed between the pole and the principal focus of a concave mirror, the image formed is virtual, erect, and enlarged.  Question 4: Why do we prefer a convex

                          Class 10th Maths                Introduction of Trigonometry                          Shiva valley school   Exercise 8.3                                 Thank You

                        Class 10th Maths              Introduction of Trigonometry                        Shiva valley school  Exercise 8.2                                 Thank You

                  Ncert class 10th agriculture                         Shiva valley school                               Geography  Multiple choice questions (i). Which one of the following describes a system of agriculture where a single crop is grown on a large area? (a) Shifting Agriculture (b) Plantation Agriculture (c) Horticulture (d) Intensive Agriculture Answer:: (b) Plantation Agriculture (ii). Which one of the following is a rabi crop? (a) Rice (b) Millets (c) Gram (d) Cotton Answer:: (b) Gram (iii). Which one of the following is a leguminous crop? (a) Pulses (b) Millets (c) Jawar (d) Sesamum Answer: (a) Pulses (IV). Which one of the following is announced by the government in support of a crop? (a) Maximum support price (b) Minimum support price (c) Moderate support price (d) Influential support price Answer: (b) Minimum support price Question 2: Answer the following questions in 30 words. (i). Name one important beverage crop and specify the geographical conditions required

                              Class 10th Maths                    Introduction to Trigonometry                           Shiva valley School       Exercise:-8.1                Thank You 

  Chapter 11 - Human Eye and Colourful World                             Shiva valley school Question 1:  A student has difficulty reading the blackboard while sitting in the last row. What could be the defect the child is suffering from? How can it be corrected? Answer: A student has difficulty in reading the blackboard while sitting in the last row. It shows that he is unable to see distant objects clearly. He is suffering from myopia. This defect can be corrected by using a concave lens. Question 2: The human eye can focus objects at different distances by adjusting the focal length of the eye lens. This is due to (a) presbyopia (b) accommodation (c) near-sightedness (d) far-sightedness Answer: (b) Human eye can change the focal length of the eye lens to see the objects situated at various distances from the eye. This is possible due to the power of accommodation of the eye lens.  Question 3: The human eye forms the image of an object at its  (a) cornea  (b) iris  (c) pupil  (d) ret

                          Class 10th English                                               Shiva valley school                                                  The Hundred Dresses - ll                Question 1. What did Mr Petronski's letter say? Answer: Mr Petronski's letter was to inform the principal and Miss Mason that Wanda would not come to school as she was fed up of being bullied in the school. They were going to shift to a bigger place where nobody would make fun of their last name Question 2. Is Miss Mason angry with the class, or is she unhappy and upset? Answer:  Miss Mason seems to be unhappy and upset rather than angry because she had never expected such a behaviour from the students. She wants everyone to think about it and asks them not to do look down anyone in the class. Question 3. How does Maddie feel after listening to the note from Wanda's father? Answer: Maddie feels sorry and ashamed for the behaviour although she herself did not make fun of Wanda.

                              6. Life Processes                            Class 10th Science                              Shiva Valley School                             Question 1:  Describe the structure and functioning of nephrons. Answer Nephrons are the basic filtering units of kidneys. Each kidney possesses large number of nephrons, approximately 1-1.5 million. The main components of the nephron are glomerulus, Bowman's capsule, and a long renal tubule. Structure of a nephron Functioning of a nephron: The blood enters the kidney through the renal artery, which branches into many capillaries associated with glomerulus. The water and solute are transferred to the nephron at Bowman's capsule. In the proximal tubule, some substances such as amino acids, glucose, and salts are selectively reabsorbed and unwanted molecules are added in the urine. The filtrate then moves down into the loop of Henle, where more water is absorbed. From here, the filtrate moves upwards into the d

                            Class 10th English                             Shiva valley school                         The Hundred Dresses - l  Question 1. Where in the classroom does Wanda sit and why? Answer:  Wanda Petronski used to sit on the corner most benches, lost in her world, where rough boys usually sat She was a very poor, shy and quiet girl and did not want to mess with others so she preferred to sit in isolation. Question 2. Where does Wanda live? What kind of a place do you think it is? Answer:  Wanda lives upon Boggins Heights, where poor people live. It is not a developed area and is covered with mud. There are no proper roads or streets and it is a kind of slum. Question 3. When and Why do Peggy and Maddie notice Wanda's absence? Answer:  Wanda didn't come to school on Monday and Tuesday but nobody noticed her absence as she did not have friends in the class. When Peggy and Maddie waited for Wanda to make fun of her after the school was off, they noticed that