MCQ- 19 ICSE Physics class 10 ch-2 Light

Class 10 - Light Quiz (Power of Lens)

1. The power of a lens is measured in:

joules (J)
diopters (D)
newton (N)
watts (W)

2. The power of a convex lens is:

Positive
Negative
Zero
Infinite

3. The formula for the power of a lens is:

P = u/v
P = 100/f
P = 1/u
P = 100/u

4. The power of a concave lens is:

Positive
Negative
Zero
Infinite

5. If the focal length of a lens is 50 cm, its power is:

2D
+2D
-2D
0D

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