The power of accommodation of the eye is due to MCQ with Answer and Explanation

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The power of accommodation of the eye is due to

A. Change in cornea

B. Change in pupil size

C. Change in retina

D. Change in curvature of lens

Answer: Option D

Solution (By JKExamLibrary)

Ciliary muscles change lens shape, altering focal length.

This question belongs to: Science Physics

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Practice More Physics Questions

Question #1 Report Error

Hydraulic brakes used in automobiles operate on the basis of:

A. Bernoulli's Theorem

B. Newton's Law of Viscosity

C. Archimedes' Principle

D. Pascal's Law

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Correct Answer: Option D

Explanation:
Hydraulic brakes operate on Pascal's Law. It states that an external pressure applied to an enclosed, incompressible fluid is transmitted undiminished equally in all directions throughout the fluid volume. When force is applied to the small brake pedal cylinder, it exerts a large pressure that is transmitted to the larger wheel cylinders, amplifying the force.

This question belongs to: Science Physics

Question #2 Report Error

A force of 12 N gives an object acceleration 4 m/s². Mass of object is

A. 8 kg

B. 48 kg

C. 0.33 kg

D. 3 kg

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Correct Answer: Option D

Explanation:
m = F/a = 12/4 = 3 kg.

This question belongs to: Science Physics

Question #3 Report Error

EM wave: E and B fields are:

A. Random

B. Perpendicular to each other and propagation

C. Parallel to propagation

D. Parallel

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Correct Answer: Option B

Explanation:
EM waves transverse: E ⊥ B ⊥ propagation direction. Derived from Maxwell's equations. Memory tip: 'EM wave: right-hand rule for E×B direction'. Wave property frequently tested in competitive modern physics sections.

This question belongs to: Science Physics

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