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Q.

A concave mirror produces three times magnified real image of an object placed at 10 cm in front of it. The image is located at__cm?


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a

30

b

40 

c

10 

d

90  

answer is A.

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Detailed Solution

The image is located at 30 cm.
The object distance, u=-10, magnification M=3.
Magnification is equal to,
M=-vu
Here, M = magnification, v = image distance and u = object distance.
Since, the magnification of the mirror is 3 times the original,
Therefore,
3=-v-10
3=v10
v=30 cm
The image is located at 30 cm the right of the mirror.
  
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