(a) If the magnification has a plus sign, then image is…………. (d) What name is given to the distance between spherical mirror and carbon paper ? f=R/2 (ii) a magnified virtual image ? (c) Image distances (v) for a convex mirror is always positive because the image is always formed behind the mirror. Question 11: Class 10 - Physics - Light - Numerical and Questions (See also at set 1 ) Q1: When an object is placed at a distance of 60 cm from a convex mirror, the magnification produced is 1/2. Initially, the object is placed 20 cm in front of mirror. Selina Solutions Concise Physics Class 10 Chapter 2 – Work, Energy and Power. When an object is placed in front of a plane mirror, then the right side of the object appears to become the left side of the image; and the left side of the object appears to become right side of the image. Solution : (c) State whether this spherical mirror will diverge or converge light rays. (a) Image will form between pole and focus. Make labelled ray diagrams to illustrate the formation of : Two uses of convex mirror: Thus, A’B’ is the image of the object AB formed by the concave mirror. (a) Incident ray Solution : Describe with the help of a diagram, the nature, size and position of the image formed when an object is placed beyond the centre of curvature of a concave mirror. In this post, I am sharing the Most Important Numerical Questions of Physics for 10th Class.Here you can get Class 10th Physics Important Numericals that are mostly repeated in Board Exams, These Important Physics Numericals for 10th Class are based on Punjab Text Book. Solar furnace mirror – concave mirror. At focus. Solution : Complete the following sentence : Give reasons for your choice. An object 20 cm from a spherical mirror gives rise to a virtual image 15 cm behind the mirror. Question 25: Find the focal length of the mirror and the kind of mirror in each case. Concave mirrors are used as shaving mirrors. Solution : Question 10: (i) a magnified real image ? Chapter 11 When the man starts walking towards the mirrors, he finds that the size of his face in mirror A goes on increasing but that in mirror B remains the same Where is the image when you look at something in a mirror ? So, the focal length (f) of a spherical mirror is equal to half of its radius of curvature (R). Lateral inversion. Solution : (b) At focus. Solution : Question 21: (a) back side of a shining steel spoon ? For what position of an object, a concave mirror forms a real image equal in size to the object ? What is the nature of the image ? Which mirror is used as a torch reflector ? Solution : (iv) An image of same size as the object – When the object is placed at a distance of 30 cm from the mirror i.e., at the centre of curvature. (a) Regular reflection Lateral inversion. diagram 47. Question 17: What is the difference between a real image and a virtual image ? Question 12: (iii) A diminished real image – When the object is placed at a distance of 35 cm from the mirror i.e. A bright object 50 mm high stands on the axis of a concave mirror of focal length 100 mm and at a distance of 300 mm from the concave mirror. A image of our face in a plane mirror is laterally inverted, so left is right and right is left. (b) What is the radius of curvature of the mirror ? Therefore, he has to walk 10 m – 2.5m = 7.5 m towards the mirror, Question 37: clearly the pole, focus and centre of curvature on the diagram. (b) Which type of spherical mirror will it provide ? Even steel can be melted in this furnace. (a) 45 cm (b) 20 cm (c) 25 cm (d) 30 cm Question 26: ICSE Class 10 Physics Chapter 1 Force gives the students a clear understanding about the concepts translational and rotational motions, moment of a force or torque, couple, equilibrium bodies, principle of moments, centre of gravity, uniform circular motion, centripetal and centrifugal force. Solution : For e.g., if we measure the angle of reflection NOB in the figure, we will find that it is exactly equal to the angle of incidence AON. (a) principal focus. So the image will form 20 cm behind the mirror. A concave mirror produces three times enlarged virtual image of an object placed at 10 cm in front of it. Bulb is placed at the focus of the torch reflector. We focus a distant object (several metres away) like a window or tree on a screen by using a concave mirror whose focal length is to be determined. Question 25: (e) Aperture: The portion of a mirror from which the reflection of light actually takes place is called the aperture of the mirror. Draw a ray-diagram to illustrate your answer. (a) R=50cm Shaalaa has a total of 141 questions with solutions for this chapter in Class 10 Physics. Question 27: (c) State two characteristics of the image formed. Therefore, the distance between object and image=10+10=20cm. Name the mirror which can give : (b) Draw diagram to show the action of convex mirror on a beam of parallel light rays. motion and force solved numericals & problems for physics class 10th notes from chapter no 04 karachi board science group Adamjee Coaching Free Notes, MCQs, Online Test, Guess Papers and Past Papers for Class 9th, 10th, 11th, 12th (a) back side of a shining steel spoon – convex mirror Solution : Explain how to read the following message which was found on some blotting paper : (a) 00 If you switch on an electric bulb in this dark room as a light source, explain how you could now see : (b) Virtual and erect; real and inverted. Solution : Question 6: If the magnification of a body of size 1 m is 2, what is the size of the image ? Question 17: Question 40: When an object is placed at a distance of 15 cm from a concave mirror, its image is formed at 10 cm in front of the mirror. Solution : Question 9: (a) Concave mirror A dentist’s mirror has a radius of curvature of 3 cm. An object of size 7.0 cm is placed at 27 cm in front of a concave mirror of focal length 18 cm. Find the object and image positions. (b) When the boy walks towards the mirror at a speed of 1 m/s, his image will also appear to move towards the mirror at the same speed of 1 m/s. (b) principle focus. (b) an erect and diminished image of an object. Explain why, a ray of light passing through the centre of curvature of a concave mirror gets reflected back along the same path. Describe the New Cartesian Sign Convention used in optics. What is a spherical mirror ? This is because distances measured to the left of the mirror are negative and to the right of the mirror is positive. (b) 00, Question 5: The image is formed behind the mirror at the same distance as the object is kept in front of the mirror. If you want to see an enlarged image of your face, state whether you will use a concave mirror or a convex mirror ? All the distances are measured from the……….. of a spherical mirror. Question 7: (a) a convex mirror ? What type of mirror could be used : Question 11: (b) At the focus of the mirror. Question 5: Solution : An object placed 20 cm in front of a mirror is found to have an image 15 cm (a) in front of it, (b) behind the mirror. (iii) The image in a plane mirror is of the same size as the object. Question 15 (a) Convex mirror (b) Concave mirror, Question 2: Two types of spherical mirrors are: What would your image look like if you stood dose to a large : It will give us the approximate focal length of the concave mirror. Solution : (b), Question 13: Question 4: (b) Regular reflection What is the position of the image when an object is placed at a distance of 20 cm from a concave mirror of focal length 20 cm ? (c) Normal: The normal is a line at right angle to the mirror surface at the point of incidence. =25/2 (d) Reflected ray: The ray of light which is sent back by the mirror is called the reflected rays. What does this statement mean ? reflection from the mirror. Which kind of mirror is used in the headlights of a car ? Solution : Since a large image of the face is seen in the concave mirror, it becomes easier to make a smooth shave. Cosider a point source of light O placed in front of a plane mirror MM’. Question 8: f =12.5cm. Hence, the angle of reflection is also 60o. Since a concave mirror converges a parallel beam of light rays, it is also called a converging mirror. (d) Stronger signals will be received. The impression on blotting paper is the mirror image of the written massage. Question 19: focus. (b). Chapter 2. Question 13: (e) What is the advantage of using a carbon paper rather than a white paper ? Write the mirror formula. Name the two types of spherical mirrors. Solution : Question 9: (a) Object distance (u) for a concave mirror or convex mirror is always negative because an object is always placed to the left side of the mirror and the distances towards the left of the mirror are always negative. (b) a concave mirror ? Question 6: Question 38: Illustrate your answer by drawing labelled ray diagrams for both. Give the meaning of each symbol which occurs in it. a ray of light OA coming from O in incident at point A on the mirror and gets reflected in the direction AX according to the laws of reflection of light. The radius of curvature of a convex mirror used as a rear view mirror in a moving car is 2.0 m. A truck is coming from behind it at a distance of 3.5 m. Calculate (a) position, and (b) size, of the image relative to the size of the truck. The focal length of a concave mirror is the distance from the………. (ii) a convex mirror ? (a) The image will form 2 m behind the mirror and the width of the image of boy’s mouth will be 5 cm. That is, the distance of image (or screen) from the concave mirror will be equal to the focal length of concave mirror. Solution : (f) Angle of reflection: The angle of reflection is the angle made by the reflected ray with the normal at the point of incidence. (c) bottom part of the mirror ? One wants to see a magnified image of an object in a mirror. That is why we have uploaded quality notes of 11th class physics. Solution : Question 7: With the help of a labelled ray-diagram, describe how a plane mirror forms an image of a point source of light placed in front of it. Question 20: This is because when the object lies within the focus of a concave mirror, it forms an enlarged, virtual and erect image. Equal. (a) Between pole and focus of the mirror. Solution : Question 16: (b) Uses of Plane mirrors: Question 5: We will keep adding updated notes, past papers, guess papers and other materials with time. Question 1: Make-up mirror – concave mirror. (a) an erect and enlarged image of an object. Write down a formula for the magnification produced by a concave mirror. Give one example of each type of image. (a) An object is placed just outside the principal focus of concave mirror. Solution : (b) The image in a plane mirror is virtual and laterally inverted. Solution : What is the advantage of using a convex mirror as a rear-view mirror in vehicles as compared to a plane mirror ? Lakhmir Singh Physics Class 10 Solutions Page No:179. Solution : Draw a ray diagram to show how the image is formed, and describe its size, position and nature. Name the spherical mirror which can produce a real and diminished image of an object. (a) in a plane mirror ? Solution : Question 25: virtual principal focus. Where is the bulb placed in relation to the torch reflector ? We have uploaded solved numericals and short questions of 21 chapter of physics ch 10 (ii) real and inverted, Question 12: Solution : Question 19: Question 29: So, f > 100 mm A parallel beam of light incident on it, gets scattered by making reflected rays in different directions. Solution : Question 6: Which property of light makes a pencil cast a shadow when it is held in front of a light source ? (ii) A convex mirror has wider field of view. When an object is placed at the centre of curvature (C) of a concave mirror, the image formed is: Lakhmir Singh Physics Class 10 Solutions Page No:206. (i) between its pole and focus Give reasons for your answer. (a) State Snell’s law of refraction. (a) mirror A is concave and mirror B is convex All the light rays which are parallel to the principal axis of a concave mirror, converge at the the principal focus (F) after reflection from the mirror. Concave mirror. For obtaining an enlarged upright image of an object, the object is placed between focus (F) and pole (P) of the concave mirror. R = 50 cm. (iii) Plane mirrors are used to make periscopes. A man holds a spherical shaving mirror of radius of curvature 60 cm, and focal length 30 cm, at a distance of 15 cm, from his nose. (d) Focal length. Question 1: An object is placed at the following distances from a concave mirror of focal length 15 cm, turn by turn : Find the position and nature of the image. Fill in the following blank with a suitable word : Question 16: (c) the same size as the object. Question 4: Therefore, angle of reflection=300 A ray of light strikes a plane mirror at an angle of 40° to the mirror surface. Radius of curvature (R) = 32cm (b) In case of a concave mirror, if the image is formed on the left side of the mirror, then the image distance (v) will be negative and if the image is formed on the right side of the mirror, then the image distance (v) will be positive. Question 11: What is the shape of : Describe the nature of image formed when the object is placed at a distance of 20 cm from a concave mirror of focal length 10 cm. Shaving mirrors, Car headlight mirror, Searchlight mirror, Driving mirror, Dentist’s inspection mirror, Torch mirror, Staircase mirror in a double-decker bus, Make-up mirror, Solar furnace mirror, Satellite TV dish, Shop security mirror. Solution : (a) Between focus and centre of curvature. Find the nature and position of the image formed in each case. The notes contain solution of all the numerical. Which of the following are concave mirrors and which convex mirrors ? The image is bigger in size than the object, hence it is an enlarged image. (c) It will diverge light rays. Question 21: A ray of light is incident normally on a plane mirror. Give two uses of concave mirrors. Find the size and nature of image. Question 5: What will be the nature of the image ? Dentist’s inspection mirror – concave mirror. (a) as a shaving mirror ? (a) Height of a real image. Name the phenomenon responsible for the following effect: Download Formulae Handbook For ICSE Class 9 and 10. The reflected rays DF and EC are produced backwards (as shown by dotted lines). What type of reflection of light takes place from : A ray of light going towards the focus of a convex mirror becomes parallel to the principal axis after reflection from the mirror. (ii) Focal length of a concave mirror: The focal length of a convex mirror is the distance from the pole (P) to its principal focus (F). Since the image formed is upright, the object lies within the focus of the concave mirror. Solution : Solution : Question 8: State two characteristics of the image formed. A converging mirror forms a real image of height 4 cm of an object of height 1 cm placed 20 cm away from the mirror : The dentist holds a small concave mirror in such a way that the tooth lies within its focus. Ray AB strikes the mirror PQ at B and gets reflected along BC according to the laws of reflection. Plane mirror. Solution : Question 22: Satellite TV dish – concave mirror. The following chapters numericals are given in this pdf file taken from exercise and examples from the texts of the book: Chapter 1. (a) Where must the mirror be situated ? What kind of mirror can have a focal length of, – 20 cm ? If an object is placed at a distance of 10 cm in from of a plane mirror, how far would it be from its image ? Solution : Focal length (f) = 25 cm Solution : Solution : (ii) A magnified virtual image – When the object is placed at a distance of 10 cm from the mirror i.e., within its focus. (ii) Positive. From second law of reflection, we know that angle of incidence is equal to angle of reflection. An object is 100 mm in front of a concave mirror which produces an upright image (erect image). Solution : Question 28: (a) A boy with a mouth 5 cm wide stands 2 m away from a plane mirror. Solution : Between focus and centre of curvature. Why does a driver prefer to use a convex mirror as a rear-view mirror in a vehicle ? Question 10: At what distance from the mirror should a screen be placed to get the sharp image ? Solution : So, R > 200 mm Write the word AMBULANCE as it would appear when reflected in a plane mirror. R= 25cm (Given) Solution : f = R/2 An arrow 2.5 cm high is placed at a distance of 25 cm from a diverging mirror of focal length 20 cm. What is the angle of reflection ? (ii) real and inverted, If an object is placed at a distance of 8 cm from a concave mirror of focal length 10 cm, discuss the nature of the image formed by drawing the ray diagram. This is the post on the topic of the Matric 10th Class Physics Chapter 10 Numerical Problems Solved |10th Physics Notes. Solution : Question 30: (b) Our image will be enlarged, virtual and erect. Find the focal length of a concave mirror whose radius of curvature is 32 cm. (iii) a diminished real image ? Question 3: The angle of reflection at the second mirror is : Solution : Question 44: (a) 30° (b) 45° (c) 60° (d) 90° (d) mirror A is convex and mirror B is plane Calorimetry Class-10 Goyal Brothers ICSE Physics Solutions Chapter-4 Calorimetry .We Provide Step by Step Answer of Exercise, MCQs, Numericals Practice Problem Questions of Exercise-1 Calorimetry ICSE Class-10 .Visit official Website CISCE for detail information about ICSE Board Class-10 Physics. Solution : Lakhmir Singh Physics Class 10 Solutions Page No:200, Question 42: Question 18: (a) convex mirror ? Solution : Question 10: It cannot be received on a screen. Explain with a suitable diagram, how a concave mirror converges a parallel beam of light rays. Solution : Question 19: (a) Draw a labelled ray diagram to show the formation of image of an object by a convex mirror. Question 37: When an object is placed at a distance of 50 cm from a concave spherical mirror, the magnification produced Solution : Calculate the image position and magnification in each case. (i) A magnified real image – When the object is placed at a distance of 20 cm from the mirror i.e., between focus and centre of curvature. Solution : Question 20: Briefly describe how you would find the focal length of a concave mirror quickly but approximately. Angle to the mirror surface=400 Solution : Question 5: (a) its real image is formed 20 cm from the mirror ? Chapter 5. (a) Our image will be diminished, virtual and erect. Draw labelled ray-diagrams to show the formation of image in both the cases. Concave mirror should be used to get a magnified image. This means that the object lies between the pole and focus of the concave mirror. (a) between infinity and pole of the mirror ? Class 10 Physics Notes - Chapter 15 - Electromagnetism - Numerical Problems. We know you are looking for 1st year physics Numericals & SQs of Chapter 4 Work and Energy in PDF to download. Solution : Question 15: What is the nature of a mirror having a focal length of, +10 cm ? For e.g., in the figure, the incident ray AO, the reflected ray OB and the normal ON, all lie in the same plane, the plane of paper. We will also introduce a mobile app for viewing all the notes on mobile. Solution : Question 29: Question 12: (i) Concave mirrors are used as shaving mirrors. Solution : (a) Mirror B is convex since it forms a smaller image of fork. What is the minimum number of rays required for locating the image formed by a concave mirror for an object ? Solution : Question 9: The notes contain solution of all the given numerical. Staircase mirror in a double-decker bus – convex mirror. Therefore, to read this message we need to hold the written message in front of a mirror so that the mirror produces a laterally inverted image of this message. Solution : (c) Is the mirror convex or concave ? Solution : So, the angle of incidence on this mirror is 90o-30o=60o. The image formed by a plane mirror is a virtual image. For what position of an object, a real and diminished image is formed by a concave mirror ? State the relation between object distance, image distance and focal length of a spherical mirror (concave mirror or convex mirror). Solution : (iii) Draw a ray-diagram to show the formation of image. (c) image distances (v) for a convex mirror Solution : Solution : Solution : Question 23: Work is said to be done only when the force applied on a body makes the body move (i.e., there is a displacement of the body). Support your answer with reason. A man is standing at such a distance from the wall that he can see the erect image of his face in both the mirrors. Solution : The images formed in the convex rear-view mirror will be smaller than those formed in the plane rear-view mirror. Car headlight mirror – concave mirror. Solution : Question 28: Lakhmir Singh Physics Class 10 Solutions Page No:189. For a convex mirror, parallel rays of light appear to diverge from a point called the………… (a) (i) Principal focus of a concave mirror: The principal focus of a concave mirror is a point on its principal axis to which all the light rays which are parallel and close to the axis, converge after reflection from the concave mirror. Question 2: What type of image/images are formed by : (a) Centre of curvature: Centre of curvature of a spherical mirror is the centre of the hollow sphere of glass of which the mirror is a part. Convex mirror always produces a virtual, erect and diminished image. Chapter 9. What name is given to this type of image ? (c) Write all the capital letters of the alphabet which look the same in a plane mirror. You can easily … Question 40: Solution : Solution : Question 12: (c) An object is 24 cm away from a concave mirror and its image is 16 cm from the mirror. Calculate the focal length of the mirror. Therefore, the light ray will be reflected back along the same path. Selina ICSE Solutions for Class 10 Physics Chapter 4 Refraction of Light at Plane Surfaces. Concave mirror is used by dentists. A communications satellite in orbit sends a parallel beam of signals down to earth. Solution : Driving mirror – convex mirror. Define the following terms used in the study of reflection of light by drawing a labelled ray-diagram : The image seen in a plane mirror cannot be formed on a screen. Chapter 3. Define linear magnification produced by a mirror. Question 20: Between which two points of concave mirror should an object be placed to obtain a magnification of: (b) Should it be concave or convex? On this diagram mark principal axis, principal focus F Solution : (iii) smaller than the object (or diminished). Radius of curvature (R) = ? Solution : A man stands 10 m in front of a large plane mirror. An object is kept at a distance of 5 cm in front of a convex mirror of focal length 10 cm. (c) At the focus. Question 18: (b) Virtual and erect; real and inverted. Solution : Distance between man and the image of chart = Distance between man and the mirror + Distance between mirror and the image of the chart = 2 m + 2.5 m = 4.5 m. Question 39: Draw a labelled diagram to represent this situation. (ii) Concave mirrors are used by dentists to see the large images of the teeth of patients. Solution : Class 10 Physics Notes - Chapter 10 - Simple Harmonic Motion and Waves - Numerical Problems. The post is tagged and categorized under in 10th notes, 10th physics notes, Education News, Matric Notes, Notes Tags. At what distance from a concave mirror of focal length 10 cm should an object 2 cm long be placed in order to get an erect image 6 cm tall ? Give two uses of a convex mirror. Solution : Question 14: An object is placed at a distance of 6 cm from a convex mirror of focal length 12 cm. (c) State three characteristics of the image formed by a convex mirror. (a) 35 cm (b) 30 cm (c) 20 cm (d) 10 cm Torch mirror – concave mirror. (b) Mirror A is concave since it forms a larger image of fork. placed at the centre of curvature of a concave mirror. Mark clearly the pole, focus, centre of curvature and position of object in each case. An object 3 cm high is placed at a distance of 8 cm from a concave mirror which produces a virtual image 4.5 cm high : Solution : f=R/2 = 50/2 = 25 cm Lakhmir Singh Physics Class 10 Solutions Page No:198. Distance between mirror and image=10cm. Solution : f=? Concave metal dish: It will collect the parallel beam of satellite signals at its focus where receiving aerial is fixed. Pole. Calculate the distance of the image from mirror. (c) Mirror A is concave and mirror B is concave, Lakhmir Singh Physics Class 10 Solutions Page No:209.