M.C.Q-[Phy-1M]

MCQ 11 Mark

In the following diagram the correctly marked angles are:

A
$\angle \mathrm{A}, \angle \mathrm{r}$ and $\angle \mathrm{D}$
B
$\angle \mathrm{i}, \angle \mathrm{A}$ and $\angle \mathrm{D}$
C
$\angle \mathrm{A}, \angle \mathrm{i}$ and $\angle \mathrm{e}$
✓
$\angle \mathrm{A}$ and $\angle \mathrm{e}$

Answer

Correct option: D.

$\angle \mathrm{A}$ and $\angle \mathrm{e}$

(D) $\angle \mathrm{A}$ and $\angle \mathrm{e}$

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MCQ 21 Mark

Find the incorrect statement:
A. Convex mirrors are used by the dentist to see the large images of teeth of patients.
B. Convex mirrors are used as rear-view mirrors in cars, motorcycles, scooters, etc
C. Concave mirrors are used for shaving purpose.
D. Concave mirrors are used by doctors to focus light inside the ear or inside the mouth for medical examination.

A
(B)
B
(C)
✓
(A)
D
(D)

Answer

Correct option: C.

(A)

(C) (A)
Explanation:Concave mirrors are used by the dentist to see the large images of teeth of patients since concave mirrors form enlarged images. Concave mirrors are also used for shaving purpose. Convex mirrors form diminished images. They are used as rearview mirrors in cars, motorcycles, scooters, etc since they give a wide field of view.

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Science M.C.Q-[Phy-1M]

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