A convex mirror is used as a rear-view mirror because it MCQ with Answer and Explanation

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A convex mirror is used as a rear-view mirror because it

A. Gives wider field of view

B. Magnifies image

C. Gives real image

D. Inverts image

Answer: Option A

Solution (By JKSSB Mock Tests)

Convex mirror diverges rays, gives erect, diminished, virtual image with wider field. Concave would magnify but narrow field. Plane gives normal view. Safety advantage.

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Practice More Physics Questions

Question #1

Myopia is corrected by

A. Convex lens

B. Cylindrical lens

C. Concave lens

D. Bifocal lens

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Correct Answer: Option C

Explanation:
Myopia (nearsightedness) requires diverging lens (concave). Hypermetropia needs convex.

This question belongs to: Science Physics

Question #2

If a stone dropped from the top of a tower reaches the ground in 4 seconds, what is the approximate height of the tower? (Take g = 10 m/s²)

A. 40 m

B. 160 m

C. 80 m

D. 60 m

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Correct Answer: Option C

Explanation:
Using the second equation of motion for free fall: h = ut + ½gt². Since it is dropped, initial velocity (u) = 0. Time (t) = 4s, g = 10 m/s². The height h = 0 + ½(10)(4)² = 5 × 16 = 80 meters.

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Question #3

The colour of light with minimum wavelength in visible spectrum is

A. Red

B. Yellow

C. Green

D. Violet

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Correct Answer: Option D

Explanation:
Violet ~400 nm, shortest wavelength.

This question belongs to: Science Physics

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