AP (Advanced Placement) Physics(B-C): Questions 568 - 571 of 920

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Question number: 568

» Atomic & Nuclear Physics

MCQ▾

Question

Ultraviolet light of wavelength from a mercury arc falls upon a silver photocathode. If the photoelectric threshold wavelength for silver is , then what is the least potential difference which must be applied between the anode and the photo cathode to prevent electrons from the photo – cathode?

Choices

Choice (5) Response

a.

b.

c.

d.

e.

None of the above

Question number: 569

» Light & Optics

MCQ▾

Question

A light travels from air into an optical fiber with an index of refraction of . In which direction does light bend?

Choices

Choice (5) Response

a.

Towards the surface of optical fiber at where light incident

b.

Parallel to the normal to surface

c.

Away from the normal to the surface

d.

Towards normal to the surface

e.

None of the above

Question number: 570

» Gravitation and Circular Motion

MCQ▾

Question

Two planets have the same density, but the radius of one of the planets is half that of the other. An object weights on the surface of the smaller planet. What does it weight on the surface of the larger planet?

Choices

Choice (5) Response

a.

b.

c.

d.

e.

Question does not provide sufficient data or is vague

Question number: 571

» Kinematics in One and Two Dimensions

MCQ▾

Question

Consider an object moves with constant velocity on linear path. The time required to cover distance covered is measured by ratio of distance to velocity . Then which of the following is equivalent to time ?

Choices

Choice (5) Response

a.

b.

c.

d.

e.

None of the above

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