The magnifying power of a simple microscope is maximum when the image is formed at MCQ with Answer and Explanation

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The magnifying power of a simple microscope is maximum when the image is formed at

A. Focus

B. 2F

C. Near point

D. Infinity

Answer: Option C

Solution (By JKSSB Mock Tests)

M = 1 + D/f when image at near point (D = 25 cm). For infinity, M = D/f. So max at near point.

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Question #1

The unit of resistance is

A. Ohm

B. Watt

C. Ampere

D. Volt

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Correct Answer: Option A

Explanation:
Ohm (Ω) = V/A.

This question belongs to: Science Physics

Question #2

The ripple factor of a full wave rectifier is approximately

A. 0.48

B. 0.01

C. 1.21

D. 0.12

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Correct Answer: Option A

Explanation:
Full wave ripple factor ~0.48, half wave ~1.21.

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Question #3

A car starts from rest and accelerates uniformly at 2 m/s² for 10 s. Distance covered in 10th second is

A. 20 m

B. 2 m

C. 19 m

D. 10 m

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Correct Answer: Option C

Explanation:
s_nth = u + (a/2)(2n-1) = 0 + (2/2)(20-1) = 19 m.

This question belongs to: Science Physics

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