JEE Main & Advanced Physics Ray Optics Question Bank

done Spherical Mirror Total Questions - 44

• question_answer1)
  A convex mirror of focal length f forms an image which is \[\frac{1}{n}\] times the object. The distance of the object from the mirror is
  A)
             \[(n-1)f\]                                done clear
  B)
             \[\left( \frac{n-1}{n} \right)f\] done clear
  C)
             \[\left( \frac{n+1}{n} \right)f\]                                         done clear
  D)
             \[(n+1)f\] done clear
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• question_answer2)
  A diminished virtual image can be formed only in  [MP PMT 2002]
  A)
             Plane mirror                          done clear
  B)
             A concave mirror done clear
  C)
             A convex mirror                   done clear
  D)
             Concave-parabolic mirror done clear
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• question_answer3)
  Which of the following could not produce a virtual image
  A)
             Plane mirror done clear
  B)
             Convex mirror done clear
  C)
             Concave mirror done clear
  D)
             All the above can produce a virtual image done clear
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• question_answer4)
  An object \[5cm\] tall is placed \[1m\] from a concave spherical mirror which has a radius of curvature of \[20cm\] The size of the image is                                                             [MP PET 1993]
  A)
             \[0.11cm\]                             done clear
  B)
             \[0.50cm\] done clear
  C)
             \[0.55cm\]                             done clear
  D)
             \[0.60cm\] done clear
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• question_answer5)
  The focal length of a concave mirror is \[50cm.\] Where an object be placed so that its image is two times and inverted
  A)
             75 cm                                       done clear
  B)
             72 cm done clear
  C)
             63 cm                                       done clear
  D)
             50 cm done clear
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• question_answer6)
  An object of size \[7.5cm\] is placed in front of a convex mirror of radius of curvature \[25cm\] at a distance of \[40cm.\]The size of the image should be
  A)
             \[2.3cm\]                                done clear
  B)
             \[1.78cm\] done clear
  C)
             \[1cm\]                                   done clear
  D)
             \[0.8cm\] done clear
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• question_answer7)
  The field of view is maximum for
  A)
             Plane mirror                          done clear
  B)
             Concave mirror done clear
  C)
             Convex mirror                      done clear
  D)
             Cylindrical mirror done clear
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• question_answer8)
  The focal length of a concave mirror is f and the distance from the object to the principle focus is x. The ratio of the size of the image to the size of the object is            [Kerala PET 2005]
  A)
             \[\frac{f+x}{f}\]                   done clear
  B)
             \[\frac{f}{x}\] done clear
  C)
             \[\sqrt{\frac{f}{x}}\]          done clear
  D)
             \[\frac{{{f}^{2}}}{{{x}^{2}}}\] done clear
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• question_answer9)
  Image formed by a convex mirror is                   [MP PET 1993]
  A)
             Virtual                                      done clear
  B)
             Real done clear
  C)
             Enlarged                                 done clear
  D)
             Inverted done clear
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• question_answer10)
  In a concave mirror experiment, an object is placed at a distance \[{{x}_{1}}\] from the focus and the image is formed at a distance \[{{x}_{2}}\] from the focus. The focal length of the mirror would be                                     [MP PET 1997]
  A)
             \[{{x}_{1}}{{x}_{2}}\]         done clear
  B)
             \[\sqrt{{{x}_{1}}{{x}_{2}}}\] done clear
  C)
             \[\frac{{{x}_{1}}+{{x}_{2}}}{2}\]                                       done clear
  D)
             \[\sqrt{\frac{{{x}_{1}}}{{{x}_{2}}}}\] done clear
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• question_answer11)
  A convex mirror is used to form the image of an object. Then which of the following statements is wrong [CPMT 1973]
  A)
             The image lies between the pole and the focus done clear
  B)
             The image is diminished in size done clear
  C)
             The image is erect done clear
  D)
             The image is real done clear
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• question_answer12)
  Given a point source of light, which of the following can produce a parallel beam of light               [CPMT 1974; KCET 2005]
  A)
             Convex mirror done clear
  B)
             Concave mirror done clear
  C)
             Concave lens done clear
  D)
             Two plane mirrors inclined at an angle of \[90{}^\circ \] done clear
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• question_answer13)
  The image formed by a convex mirror of focal length \[30cm\] is a quarter of the size of the object. The distance of the object from the mirror is
  A)
             \[30cm\]                                 done clear
  B)
             \[90cm\] done clear
  C)
             \[120cm\]                               done clear
  D)
             \[60cm\] done clear
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• question_answer14)
  A boy stands straight infront of a mirror at a distance of \[30cm\] away from it. He sees his erect image whose height is \[\frac{1}{5}th\]of his real height. The mirror he is using is [MP PMT 1993]
  A)
             Plane mirror                          done clear
  B)
             Convex mirror done clear
  C)
             Concave mirror                    done clear
  D)
             Plano-convex mirror done clear
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• question_answer15)
  A person sees his virtual image by holding a mirror very close to the face. When he moves the mirror away from his face, the image becomes inverted. What type of mirror he is using
  A)
             Plane mirror                          done clear
  B)
             Convex mirror done clear
  C)
             Concave mirror                    done clear
  D)
             None of these done clear
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• question_answer16)
  Which one of the following statements is true
  A)
             An object situated at the principle focus of a concave lens will have its image formed at infinity done clear
  B)
             Concave mirror can give diminished virtual image done clear
  C)
             Given a point source of light, a convex mirror can produce a parallel beam of light done clear
  D)
             The virtual image formed in a plane mirror can be photographed done clear
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• question_answer17)
  The relation between the linear magnification \[m,\] the object distance \[u\] and the focal length \[f\] is
  A)
             \[m=\frac{f-u}{f}\]             done clear
  B)
             \[m=\frac{f}{f-u}\] done clear
  C)
             \[m=\frac{f+u}{f}\]            done clear
  D)
             \[m=\frac{f}{f+u}\] done clear
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• question_answer18)
  While using an electric bulb, the reflection for street lighting should be from
  A)
             Concave mirror                    done clear
  B)
             Convex mirror done clear
  C)
             Cylindrical mirror                 done clear
  D)
             Parabolic mirror done clear
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• question_answer19)
  A concave mirror is used to focus the image of a flower on a nearby well \[120cm\] from the flower. If a lateral magnification of \[16\] is desired, the distance of the flower from the mirror should be                                 [MP PET 1986]
  A)
             \[8cm\]                                   done clear
  B)
             \[12cm\] done clear
  C)
             \[80cm\]                                 done clear
  D)
             \[120cm\] done clear
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• question_answer20)
  A virtual image larger than the object can be obtained by [MP PMT 1986]
  A)
             Concave mirror                    done clear
  B)
             Convex mirror done clear
  C)
             Plane mirror                          done clear
  D)
             Concave lens done clear
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• question_answer21)
  An object is placed \[40cm\] from a concave mirror of focal length \[20cm.\] The image formed is [MP PET 1986; MP PMT/PET 1998]
  A)
             Real, inverted and same in size done clear
  B)
             Real, inverted and smaller done clear
  C)
             Virtual, erect and larger done clear
  D)
             Virtual, erect and smaller done clear
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• question_answer22)
  A virtual image three times the size of the object is obtained with a concave mirror of radius of curvature \[36cm.\]The distance of the object from the mirror is          [MP PET 1986]
  A)
             \[5cm\]                                   done clear
  B)
             \[12cm\] done clear
  C)
             \[10cm\]                                 done clear
  D)
             \[20cm\] done clear
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• question_answer23)
  Radius of curvature of concave mirror is \[40cm\] and the size of image is twice as that of object, then the object distance is [AFMC 1995]
  A)
             \[60cm\]                                 done clear
  B)
             \[20cm\] done clear
  C)
             \[40cm\]                                 done clear
  D)
             \[30cm\] done clear
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• question_answer24)
  All of the following statements are correct except [Manipal MEE 1995]
  A)
             The magnification produced by a convex mirror is always less than one done clear
  B)
             A virtual, erect, same-sized image can be obtained using a plane mirror done clear
  C)
             A virtual, erect, magnified image can be formed using a concave mirror done clear
  D)
             A real, inverted, same-sized image can be formed using a convex mirror done clear
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• question_answer25)
  If an object is placed \[10cm\] infront of a concave mirror of focal length \[20cm,\] the image will be       [MP PMT 1995]
  A)
             Diminished, upright, virtual done clear
  B)
             Enlarged, upright, virtual done clear
  C)
             Diminished, inverted, real done clear
  D)
             Enlarged, upright, real done clear
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• question_answer26)
  Which of the following form(s) a virtual and erect image for all positions of the object                    [IIT-JEE 1996]
  A)
             Convex lens                          done clear
  B)
             Concave lens done clear
  C)
             Convex mirror                      done clear
  D)
             Concave mirror done clear
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• question_answer27)
  A convex mirror has a focal length\[f.\] A real object is placed at a distance \[f\] in front of it from the pole produces an image at                                                     [AFMC 2005]
  A)
             Infinity                                     done clear
  B)
             \[f\] done clear
  C)
             \[f/2\]                                      done clear
  D)
             \[2f\] done clear
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• question_answer28)
  An object \[1cm\] tall is placed \[4cm\] infront of a mirror. In order to produce an upright image of \[3cm\] height one needs a                                                      [SCRA 1994]
  A)
             Convex mirror of radius of curvature \[12cm\] done clear
  B)
             Concave mirror of radius of curvature \[12cm\] done clear
  C)
             Concave mirror of radius of curvature \[4cm\] done clear
  D)
             Plane mirror of height \[12cm\] done clear
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• question_answer29)
  Match List I with List II and select the correct answer using the codes given below the lists :         [SCRA 1998]

  List I (Position of the object)	List II (Magnification)
  (I) An object is placed at focus before a convex mirror	(A) Magnification is \[-\,\,\infty \]
  (II) An object is placed at centre of curvature before a concave mirror	(B) Magnification is \[0.5\]
  (III) An object is placed at focus before a concave mirror	(C) Magnification is \[+1\]
  (IV) An object is placed at centre of curvature before a convex mirror	(D) Magnification is ? 1
  	(E) Magnification is \[0.33\]

  Codes:
  A)
  I-B, II-D, III-A, IV-E              done clear
  B)
  I-A, II-D, III-C, IV-B done clear
  C)
  I-C, II-B, III-A, IV-E              done clear
  D)
  I-B, II-E, III-D, IV-C done clear
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• question_answer30)
  A concave mirror gives an image three times as large as the object placed at a distance of \[20cm\] from it. For the image to be real, the focal length should be [SCRA 1998; JIPMER 2000]
  A)
             \[10cm\]                                 done clear
  B)
             \[15cm\] done clear
  C)
             \[20cm\]                                 done clear
  D)
             \[30cm\] done clear
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• question_answer31)
  The minimum distance between the object and its real image for concave mirror is          [RPMT 1999]
  A)
             f      done clear
  B)
             2f done clear
  C)
             4f    done clear
  D)
             Zero done clear
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• question_answer32)
  An object is placed at \[20cm\] from a convex mirror of focal length \[10\,cm.\] The image formed by the mirror is [JIPMER 1999]
  A)
             Real and at \[20\,cm\] from the mirror done clear
  B)
             Virtual and at \[20\,cm\] from the mirror done clear
  C)
             Virtual and at \[20/3\,cm\] from the mirror done clear
  D)
             Real and at \[20/3\,cm\] from the mirror done clear
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• question_answer33)
  A point object is placed at a distance of \[10\,cm\] and its real image is formed at a distance of \[20\,cm\] from a concave mirror. If the object is moved by \[0.1cm\] towards the mirror, the image will shift by about                                        [MP PMT 2000]
  A)
             \[0.4cm\] away from the mirror done clear
  B)
             \[0.4cm\]towards the mirror done clear
  C)
             \[0.8cm\] away from the mirror                                       done clear
  D)
             \[0.8cm\] towards the mirror done clear
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• question_answer34)
  Under which of the following conditions will a convex mirror of focal length f produce an image that is erect, diminished and virtual                                                              [AMU (Engg.) 2001]
  A)
             Only when 2f  > u > f         done clear
  B)
             Only when u = f done clear
  C)
             Only when u < f                   done clear
  D)
             Always done clear
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• question_answer35)
  The focal length of a convex mirror is 20 cm its radius of curvature will be                                              [MP PMT 2001]
  A)
             10 cm                                       done clear
  B)
             20 cm done clear
  C)
             30 cm                                       done clear
  D)
             40 cm done clear
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• question_answer36)
  A concave mirror of focal length 15 cm forms an image having twice the linear dimensions of the object. The position of the object when the image is virtual will be
  A)
             22.5 cm                                    done clear
  B)
             7.5 cm done clear
  C)
             30 cm                                       done clear
  D)
             45 cm done clear
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• question_answer37)
  A point object is placed at a distance of 30 cm from a convex mirror of focal length 30cm. The image will form at [JIPMER 2002]
  A)
             Infinity done clear
  B)
             Focus done clear
  C)
             Pole done clear
  D)
             15 cm behind the mirror done clear
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• question_answer38)
  An object 2.5 cm high is placed at a distance of 10 cm   from a concave mirror of radius of curvature 30 cm  The size of the image is                                                      [BVP 2003]
  A)
             9.2 cm                                      done clear
  B)
             10.5 cm done clear
  C)
             5.6 cm                                      done clear
  D)
             7.5 cm done clear
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• question_answer39)
  For a real object, which of the following can produced a real image                                          [Orissa JEE 2003]
  A)
             Plane mirror                          done clear
  B)
             Concave lens done clear
  C)
             Convex mirror                      done clear
  D)
             Concave mirror done clear
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• question_answer40)
  An object of length 6 cm is placed on the principle axis of a concave mirror of focal length f at a distance of 4f. The length of the image will be                                                        [MP PET 2003]
  A)
             2 cm                                          done clear
  B)
             12 cm done clear
  C)
             4 cm                                          done clear
  D)
             1.2 cm done clear
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• question_answer41)
  Convergence of concave mirror can be decreased by dipping in                                                 [AFMC 2003]
  A)
             Water                                      done clear
  B)
             Oil done clear
  C)
             Both                                         done clear
  D)
             None of these done clear
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• question_answer42)
  What will be the height of image when an object of 2 mm is placed on the axis of a convex mirror at a distance 20 cm of radius of curvature 40 cm                                  [Orissa PMT 2004]
  A)
             20 mm                                     done clear
  B)
             10 mm done clear
  C)
             6 mm                                        done clear
  D)
             1 mm done clear
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• question_answer43)
  Image formed by a concave mirror of focal length 6 cm, is 3 times of the object, then the distance of object from mirror is                     [RPMT 2000]
  A)
  - 4 cm                                      done clear
  B)
  8 cm done clear
  C)
  6 cm                                          done clear
  D)
  12 cm done clear
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• question_answer44)
  A concave mirror of focal length f (in air) is immersed in water (\[\mu =4/3\]). The focal length of the mirror in water will be                                                                                                [MNR 1998]
  A)
             \[f\]                                          done clear
  B)
             \[\frac{4}{3}\]\[f\] done clear
  C)
             \[\frac{3}{4}f\]                     done clear
  D)
             \[\frac{7}{3}\]\[f\] done clear
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