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Q.

An object is placed at a distance of $10cm$ from a convex mirror of focal length 15cm. Find the position and nature of the image.

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a

10cm

b

8cm

c

6cm

d

5cm

answer is C.

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Detailed Solution

Concept: The mirror’s formula used

\frac{1}{f} = \frac{1}{v} + \frac{1}{u}

According to the given question u=10cm and f =15cm

\frac{1}{f} = \frac{1}{v} + \frac{1}{u}

\frac{1}{15} = \frac{1}{v} + \frac{1}{10}

\frac{1}{v} = \frac{1}{6}

V=6 cm.
Hence, the correct option is 3.

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