A person with hypermetropia needs MCQ with Answer and Explanation

Question Report Error

A person with hypermetropia needs

A. Bifocal lens

B. Convex lens

C. Concave lens

D. Cylindrical lens

Answer: Option B

Solution (By JKExamLibrary)

Hypermetropia (farsightedness) corrected by converging convex lens.

This question belongs to: Science Physics

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Practice More Physics Questions

Question #1 Report Error

The gravitational force between two masses is F. If the distance between them is halved, the force becomes

A. 2F

B. F/2

C. 4F

D. F/4

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Correct Answer: Option C

Explanation:
Newton's law of gravitation: F ∝ 1/r². If distance r becomes r/2, new force F' ∝ 1/(r/2)² = 4/r² = 4F. So force quadruples. This inverse square law is fundamental for gravitational, electric, magnetic forces.

This question belongs to: Science Physics

Question #2 Report Error

Which famous physicist correctly formulated the laws of electromagnetic induction mathematically, later synthesizing all known electromagnetic phenomena into four fundamental equations?

A. Heinrich Hertz

B. André-Marie Ampère

C. James Clerk Maxwell

D. Michael Faraday

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Correct Answer: Option C

Explanation:
While Faraday performed the groundbreaking experimental work discovering electromagnetic induction, it was James Clerk Maxwell who formalized these discoveries mathematically. Maxwell's equations (a set of four differential equations) elegantly united electricity, magnetism, and optics, proving theoretically that light itself is a propagating electromagnetic wave.

This question belongs to: Science Physics

Question #3 Report Error

A body fully immersed in a fluid experiences an upward buoyant force equal to

A. Density of the body

B. Weight of the body

C. Weight of the fluid displaced

D. Volume of the body

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Correct Answer: Option C

Explanation:
Archimedes' principle: buoyant force = weight of fluid displaced. This force acts upward. If buoyant force ≥ weight, object floats. Submarines use ballast tanks to change weight, altering buoyancy.

This question belongs to: Science Physics

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