A car travels with a constant velocity along a straight road. The car horn with a frequency of 400 Hz is sounded continuously. A stationary observer on the roadside hears the sound from the horn at a frequency of 360 Hz. The speed of sound is 340 ms –1 . Which statement(s) is/are correct?

The car is moving away the observer

The car is moving at the speed of 38 m/s

The car is moving toward the observer

The car is moving at the speed of 31 m/s

Which of the following statements is TRUE about the Doppler Effect?

The frequency of sound approaching an observer will be higher than the frequency of sound moving away from an observer.

The frequency of sound approaching an observer will be lower than the frequency of sound moving away from the observer.

The frequency of sound approaching an observer will be equal to the frequency of sound moving away from an observer.

The frequency of sound approaching an observer will be lower than the frequency of sound emitted from a stationary source.

A source emits a sound of frequency of 400 Hz, but the listener hears it to be 390 Hz. Then, _________.

the listener is moving away from the source

the listener has a defective ear

the source is moving towards the listener

the listener is moving towards the source

Can Carry more Energy than Visible Light and Shorter Wavelengths, Higher Frequency than Visible Light.

Can carry more Energy than Visible light and Longer wavelengths, Lowest frequency.

Can Carry more Energy than X-rays

Can Carry more Energy than Gamma rays.

The Half-rule is used to find out the intensity of a wave after passing through a polariser. Which waves can use this rule?

Longitudinal waves such as sound waves

AS - Doppler effects, EM spectrum and Polarisation

11th Grade

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Practice Problem

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Easy

Thao Phuong

Used 2+ times

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32 questions

Show all answers

MULTIPLE CHOICE QUESTION

1 min • 1 pt

The energy that an electromagnetic wave carries is directly proportional to ...

its wavelength

its speed

its amplitude

its frequency

its displacement

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Which of the following electromagnetic waves has the lowest energy?

gamma ray

infrared wave

visible light wave

microwave

MULTIPLE CHOICE QUESTION

1 min • 1 pt

As the wavelength of an electromagnetic wave increases, the amount of energy in that wave carries ...

increases.

decreases.

stays the same.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

The pitch of a sound wave relates to the wave's _________________.

Amplitude

Frequency

Wavelength

Period

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What is the Doppler Effect?

A change in frequency due to the relative motion of a wave source and an observer

Thing happens When a wave overlaps with another wave

Thing happens When a wave bounces off of another object

Thing happens When a wave bends due to traveling through a different medium

Thing happens when a wave pass through a narrow gap.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

You are driving in a car and honk the horn at a person standing in the street. As you approach the person, what happens to the pitch of the horn according to you in the car?

It increases

It decreases

It stays the same because you are in the car moving with the sound.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Look at the picture. Who is experiencing a higher pitched sound?

Observer A

Observer B

There's no difference

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AS - Doppler effects, EM spectrum and Polarisation

32 questions

The energy that an electromagnetic wave carries is directly proportional to ...

Which of the following electromagnetic waves has the lowest energy?

As the wavelength of an electromagnetic wave increases, the amount of energy in that wave carries ...

The pitch of a sound wave relates to the wave's _________________.

What is the Doppler Effect?

You are driving in a car and honk the horn at a person standing in the street. As you approach the person, what happens to the pitch of the horn according to you in the car?

Look at the picture. Who is experiencing a higher pitched sound?

A car moves at 20 m/s away from a whistle. The whistle is stationary. The whistle makes a sound with a frequency of 500 Hz. The speed of sound in air is 330 m/s.

What is the frequency observed by the driver of the car?

You stand on the sidewalk next to the street. A fire truck is away from you. The frequency of the siren on the fire truck is 600 Hz.

What should you hear?

A car moves at 20 m/s towards a whistle. The whistle is stationary. The whistle makes a sound with a frequency of 500 Hz. The speed of sound in air is 330 m/s.

What is the frequency observed by the driver of the car?

Create a free account and access millions of resources

Similar Resources on Wayground

Popular Resources on Wayground

Discover more resources for Physics

AS - Doppler effects, EM spectrum and Polarisation

32 questions

The energy that an electromagnetic wave carries is directly proportional to ...

Which of the following electromagnetic waves has the lowest energy?

As the wavelength of an electromagnetic wave increases, the amount of energy in that wave carries ...

The pitch of a sound wave relates to the wave's _________________.

What is the Doppler Effect?

You are driving in a car and honk the horn at a person standing in the street. As you approach the person, what happens to the pitch of the horn according to you in the car?

Look at the picture. Who is experiencing a higher pitched sound?

A car moves at 20 m/s away from a whistle. The whistle is stationary. The whistle makes a sound with a frequency of 500 Hz. The speed of sound in air is 330 m/s.What is the frequency observed by the driver of the car?

You stand on the sidewalk next to the street. A fire truck is away from you. The frequency of the siren on the fire truck is 600 Hz.What should you hear?

A car moves at 20 m/s towards a whistle. The whistle is stationary. The whistle makes a sound with a frequency of 500 Hz. The speed of sound in air is 330 m/s.What is the frequency observed by the driver of the car?

Create a free account and access millions of resources

Similar Resources on Wayground

Popular Resources on Wayground

Discover more resources for Physics

A car moves at 20 m/s away from a whistle. The whistle is stationary. The whistle makes a sound with a frequency of 500 Hz. The speed of sound in air is 330 m/s.

What is the frequency observed by the driver of the car?

You stand on the sidewalk next to the street. A fire truck is away from you. The frequency of the siren on the fire truck is 600 Hz.

What should you hear?

A car moves at 20 m/s towards a whistle. The whistle is stationary. The whistle makes a sound with a frequency of 500 Hz. The speed of sound in air is 330 m/s.

What is the frequency observed by the driver of the car?