1
Question
A convex lens has a focal length of 10 cm. Column I gives you the distance of an object from the lens in different cases. Match the distance of the images given in column I with the cases in column I.
Distance of Object
Distance of Image
a. 2 metres from lens
i. 15 cm from lens on the same side
b. 30 cm from lens
ii. between 10 and 20 cm from lens
c. 20 cm from lens
iii. at about 10 cm from lens
d. 15 cm from lens
iv. more than 20 cm from lens
e. 6 cm from lens
v. at 20 cm from lens
| Distance of Object | Distance of Image |
| a. 2 metres from lens | i. 15 cm from lens on the same side |
| b. 30 cm from lens | ii. between 10 and 20 cm from lens |
| c. 20 cm from lens | iii. at about 10 cm from lens |
| d. 15 cm from lens | iv. more than 20 cm from lens |
| e. 6 cm from lens | v. at 20 cm from lens |
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Solution
Distance of Object
Distance of Image
a. 2 metres from the lens
iii. About 10 cm from the lens
b. 30 cm from the lens
ii. Between 10 cm and 20 cm from the lens
c. 20 cm from the lens
v. 20 cm from the lens
d. 15 cm from the lens
iv. More than 20 cm from the lens
e. 6 cm from the lens
i. 15 cm from the lens on the same side
| Distance of Object | Distance of Image |
| a. 2 metres from the lens | iii. About 10 cm from the lens |
| b. 30 cm from the lens | ii. Between 10 cm and 20 cm from the lens |
| c. 20 cm from the lens | v. 20 cm from the lens |
| d. 15 cm from the lens | iv. More than 20 cm from the lens |
| e. 6 cm from the lens | i. 15 cm from the lens on the same side |
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