# best cbse question for class 10

best cbse question for class 10 :

1. The image formed by a spherical mirror is real, inverted and its magnification is -2. If
the image is at a distance of 30 cm from the mirror, where is the object placed? Find
the focal length of the mirror. List two characteristics of the image formed if the object
is moved 10 cm towards the mirror.
2. A spherical mirror produces an image of magnification -1.0 on a screen placed at a
distance of 30 cm from the pole of the mirror .best cbse question for class 10
(i) Write the type of mirror in this case. . .(ii) What is the focal length of the
mirror? (iii) What is the nature of the images formed? (iv) Draw the ray diagram
to show the image formation in this case.
3. (a). A security mirror used in a big showroom has radius of curvature 5 m. If a
customer is standing at a distance of 20 m from the cash counter, find the position,
nature and size of the image formed in the security mirror.
(b) Neha visited a dentist in his clinic. She observed that the dentist was holding an
instrument fitted with a mirror. State the nature of this mirror and reason for its use in
the instrument used by dentist
4. The absolute refractive indices of two media A and B are 2.0 and 1.5 respectively. If
the speed of light in medium B is 2 × 108 m/s, calculate the speed of light in(i)
vacuum (ii) medium A
5. Under what condition with a glass lens placed in a transparent liquid become
invisible. best cbse question for class 10

# best cbse question for class 10

1. The image formed by a spherical mirror is real, inverted and its magnification is -2. If
the image is at a distance of 30 cm from the mirror, where is the object placed? Find
the focal length of the mirror. List two characteristics of the image formed if the object
is moved 10 cm towards the mirror.best cbse question for class 10

## best cbse question for class 10

2. A spherical mirror produces an image of magnification -1.0 on a screen placed at a
distance of 30 cm from the pole of the mirror.
(i) Write the type of mirror in this case. . .(ii) What is the focal length of the
mirror? (iii) What is the nature of the images formed? (iv) Draw the ray diagram
to show the image formation in this case.best cbse question for class 10

3. (a). A security mirror used in a big showroom has radius of curvature 5 m. If a
customer is standing at a distance of 20 m from the cash counter, find the position,
nature and size of the image formed in the security mirror.
(b) Neha visited a dentist in his clinic. She observed that the dentist was holding an
instrument fitted with a mirror. State the nature of this mirror and reason for its use in
the instrument used by dentist.best cbse question for class 10
4. The absolute refractive indices of two media A and B are 2.0 and 1.5 respectively. If
the speed of light in medium B is 2 × 108 m/s, calculate the speed of light in(i)
vacuum (ii) medium A
5. Under what condition with a glass lens placed in a transparent liquid become
invisibl

1. The image formed by a spherical mirror is real, inverted and its magnification is -2. If
the image is at a distance of 30 cm from the mirror, where is the object placed? Find
the focal length of the mirror. List two characteristics of the image formed if the object
is moved 10 cm towards the mirror.
2. A spherical mirror produces an image of magnification -1.0 on a screen placed at a
distance of 30 cm from the pole of the mirror.
(i) Write the type of mirror in this case. . .(ii) What is the focal length of the
mirror? (iii) What is the nature of the images formed? (iv) Draw the ray diagram
to show the image formation in this case.
3. (a). A security mirror used in a big showroom has radius of curvature 5 m. If a
customer is standing at a distance of 20 m from the cash counter, find the position,
nature and size of the image formed in the security mirror.
(b) Neha visited a dentist in his clinic. She observed that the dentist was holding an
instrument fitted with a mirror. State the nature of this mirror and reason for its use in
the instrument used by dentist
4. The absolute refractive indices of two media A and B are 2.0 and 1.5 respectively. If
the speed of light in medium B is 2 × 108 m/s, calculate the speed of light in(i)
vacuum (ii) medium A
5. Under what condition with a glass lens placed in a transparent liquid become
invisibl

best cbse question for class 10

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