The instrument used to view distant objects is MCQ with Answer and Explanation

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The instrument used to view distant objects is

A. Telescope

B. Microscope

C. Periscope

D. Endoscope

Answer: Option A

Solution (By JKSSB Mock Tests)

Telescope (refracting/reflecting) makes distant objects appear nearer, magnified. Microscope for tiny near objects. Periscope uses mirrors to see over obstacles. Endoscope medical.

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Question #1

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A body of mass 2 kg moves with velocity 3 m/s. It is subjected to a force of 4 N in direction of motion for 2 s. Final velocity is

A. 7 m/s

B. 8 m/s

C. 6 m/s

D. 5 m/s

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Correct Answer: Option A

Explanation:
a = F/m = 4/2 = 2 m/s². v = u + at = 3 + 2×2 = 7 m/s. Impulse = Δp = 8 N s, initial momentum 6, final 14 => v=7 m/s.

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Question #2

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The scientist who discovered the nucleus of an atom is

A. Niels Bohr

B. Ernest Rutherford

C. James Chadwick

D. J.J. Thomson

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Correct Answer: Option B

Explanation:
Rutherford's gold foil experiment (1911) revealed tiny, dense, positively charged nucleus. Thomson discovered electron, proposed plum-pudding. Chadwick discovered neutron. Bohr explained atomic spectra.

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