# AP (Advanced Placement) Physics(B-C): Questions 388 - 390 of 921

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## Question number: 388

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MCQ▾

### Question

In the illustration, a magnet is dropped through a wire loop. Which of the following statements explain, what happens in the loop as the magnet enters the plane of the loop and as the magnet continues to drop through and below the loop.

### Choices

Choice (5)Response

a.

The current in the loop is first counterclockwise and then clockwise.

b.

The current in the loop is first clockwise and then counterclockwise.

c.

The current in the loop is counterclockwise (looking downward) the entire time.

d.

The current in the loop is clockwise (looking downward) the entire time.

e.

None of the above

## Question number: 389

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MCQ▾

### Question

As a musician “warms up” a wind instrument to play, the temperature of the air in the instrument increases. What is the result of this change in the fundamental for the instrument?

### Choices

Choice (5)Response

a.

An increase in frequency and decrease in wavelength

b.

An increase in frequency and wavelength

c.

An increase in wave speed and decrease in frequency

d.

An increase in wave speed and frequency

e.

Question does not provide sufficient data or is vague

## Question number: 390

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MCQ▾

### Question

Object , which is moving to the right at speed , collides head-on and totally inelastically with an identical object B moving to the left at speed . What occurs after the collision?

### Choices

Choice (5)Response

a.

Object A moves to the right at υ and Object B moves to the left at 2υ.

b.

Object A moves to the right at 2υ and Object B moves to the left at υ.

c.

The objects move together to the left at speed υ.

d.

The objects move together to the right at speed υ.

e.

None of the above

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