The image formed on retina is MCQ with Answer and Explanation

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The image formed on retina is

A. Virtual and erect

B. Virtual and inverted

C. Real and erect

D. Real and inverted

Answer: Option D

Solution (By JKSSB Mock Tests)

Real inverted image, brain interprets as erect.

This question belongs to: Science Physics

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Question #1

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A wave completes 20 oscillations in 4 seconds. Frequency is

A. 4 Hz

B. 5 Hz

C. 0.2 Hz

D. 80 Hz

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Correct Answer: Option B

Explanation:
f = 20/4 = 5 Hz.

This question belongs to: Science Physics

Question #2

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Who gave the law of floatation?

A. Archimedes

B. Bernoulli

C. Newton

D. Pascal

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Correct Answer: Option A

Explanation:
Archimedes' principle: buoyant force = weight of displaced fluid. Law of floatation: floating body displaces fluid equal to its own weight. Archimedes discovered it. Pascal gave pressure law.

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Question #3

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A ball is thrown upward with velocity 30 m/s. Time to reach maximum height (g=10) is

A. 1.5 s

B. 2 s

C. 6 s

D. 3 s

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Correct Answer: Option D

Explanation:
v = u - gt, at top v=0 => t = u/g = 30/10 = 3 s.

This question belongs to: Science Physics

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