AP (Advanced Placement) Physics(B-C): Questions 337 - 339 of 921

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Question number: 337

» Magnetic Field & Electromagnetism

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

In figure, a loop moves through uniform magnetic field.

Choices

Choice (5) Response

a.

No current is induced in the loop.

b.

A clockwise current is induced in the loop.

c.

A counterclockwise current is induced in the loop.

d.

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

e.

None of the above

Question number: 338

» Work, Energy and Power

MCQ▾

Question

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

Choices

Choice (5) Response

a.

Holding a box above the floor for 10 minutes

b.

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

c.

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

d.

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

e.

None of the above

Question number: 339

» Periodic Motion, Mechanical Waves & Sound

MCQ▾

Question

Which of the following situations will produce the greatest Doppler shift of frequency for the frequency of a siren heard by an observer?

Choices

Choice (5) Response

a.

The observer is sitting at an intersection as the siren approaches the intersection from the east at a speed of .

b.

The siren is located at an intersection as the observer is moving away from the intersection toward the west at .

c.

The observer is in a car moving north at toward an intersection as the siren is moving toward the same intersection from the east at a speed of .

d.

The observer is in a car moving north at away from an intersection as the siren is moving toward the same intersection from the south at a speed of .

e.

Question does not provide sufficient data or is vague

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