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CBSE Class 10 Science Question 40 of 60

Solved 2022 Term 1 Question Paper CBSE Class 10 Science — Question 16

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Question

Question 40

The radius of curvature of a converging mirror is 30 cm. At what distance from the mirror should an object be placed so as to obtain a virtual image?

  1. Infinity
  2. 30 cm
  3. Between 15 cm and 30 cm
  4. Between 0 cm and 15 cm
Answer

Between 0 cm and 15 cm

Reason — Given, concave mirror as it is a converging mirror.

R = 30 cm

We know, R = 2f

Substituting we get, 30 = 2 x f

f = 302\dfrac{30}{2} = 15 cm

In a concave mirror, virtual image is obtained when the object is placed between focus and optical centre hence, object should be placed between 0 cm and 15 cm.