AP (Advanced Placement) Physics(B-C): Questions 336 - 338 of 921

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Question number: 336

» Periodic Motion, Mechanical Waves & Sound

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MCQ▾

Question

Two speakers output the same tone in the same phase. A person sitting in a chair across the room at the same distance from both speakers hears the tone very well. However, when the person moves the chair to the right so that he is one half meter closer to one speaker than to the other, he is not able to hear the tone well. What is the wavelength of the tone produced by the speakers?

Choices

Choice (5)Response

a.

b.

c.

d.

e.

None of the above

Question number: 337

» Magnetic Field & Electromagnetism

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MCQ▾

Question

In the illustration, a conducting wire loop moves at a constant velocity υ out of a uniform magnetic field directed into the page. What happens at the instant the loop is halfway out of the field?

A loop moving through magnetic field

A Loop Moving through Magnetic Field

Choices

Choice (5)Response

a.

No current is induced in the loop.

b.

A current is induced in the wire only in the part of the loop that is inside the field.

c.

A clockwise current is induced in the loop.

d.

A counterclockwise current is induced in the loop.

e.

All of the above

Question number: 338

» Work, Energy and Power

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MCQ▾

Question

In which of the following cases has a person generated the most power?

Choices

Choice (5)Response

a.

Pushing a box across a frictionless surface to accelerate it from rest to in

b.

Lifting a box onto a shelf that is high in a time of

c.

Holding a box above the floor for 10 minutes

d.

Moving a box at constant speed across a surface with a coefficient of friction of , using a force of for a distance of 10 m in a time of

e.

All of the above

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