Waves MCQ Level

Question 1

The equation of a wave disturbance is given as :
where X and y are in metres and t in seconds. Choose the wrong statement:

Accepted Answer

The speed of the constituent waves is 5 m/s

Answer

Node occurs at x = 0.15 m

Answer

The wavelength is 0.2 m

Answer

Antinode occurs at x = 0.3 m

Question 2

In a plane progressive harmonic wave particle speed is always less than the wave speed if:
(where A is wavelength of wave)

Accepted Answer

amplitude of wave is less than

Answer

amplitude of wave is less than

Answer

amplitude of wave is greater than

Answer

amplitude of wave is greater than

Question 3

Which of the following is not the standard form of a sine wave?

Accepted Answer

Answer

Answer

Answer

Question 4

Two sound source are moving in opposite directions with velocities v₁ and v₂(v₁ > v₂). Both are moving away from a stationary observer. The frequency of both the sources is 900 Hz. What is the value of v₁ - v₂ so that the beat frequency observed by the observer is 6 Hz. Speed of sound v = 300 mis. Given, that v₁ and v₂ « v.

Accepted Answer

2 m/s

Answer

4 m/s

Answer

3 m/s

Answer

1 m/s

Question 5

String 1 has twice the length, twice the radius, twice the tension and twice the density of another string 2. The relation between the fundamental frequencies of 1 and 2 is :

Accepted Answer

f2 = 4f1

Answer

f₁ = f₂

Answer

f₁ = 2f₂

Answer

f₁ = 4f₂

Question 6

A string of length L is stretched by L/20 and speed of transverse wave along it is v. The speed of wave when it is stretched by L/10 will be : (assume the Hooke’s law is applicable)

Accepted Answer

&radic;2v

Answer

4v

Answer

2v

Answer

Question 7

Speed of transverse wave in a string of density 100 kglm³ and area of cross-section 10 mm² under the tension of 10³ N is :

Accepted Answer

1000 m/s

Answer

200 m/s

Answer

2000 m/s

Answer

100 m/s

Question 8

A wave represented by the equation y1 = Acos(kx- ωt), is superimposed with another wave to form a stationary wave such that the point x = 0 is a node. The equation of the other wave is :

Accepted Answer

Answer

Answer

Answer

Question 9

The frequency changes by 10% as the source approaches a stationary observer with constant speed v_s. What would be the percentage change in frequency as the source recedes the observer with the same speed ? Given, that v_s « v ( v = speed of sound in air)

Accepted Answer

8.5%

Answer

16.7%

Answer

14.3%

Answer

20%

Question 10

A heavy rope is suspended from a rigid support. A wave pulse is set up at the lower end, then :

Accepted Answer

the pulse will travel with increasing speed

Answer

the pulse will travel with decreasing speed

Answer

the pulse will travel with uniform speed

Answer

the pulse cannot travel through the rope

Waves MCQ Level Bank Exams General Awareness MCQs & solutions - Free

MCQ Practice Test & Solutions: Waves MCQ Level (10 Questions)

The equation of a wave disturbance is given as :
where X and y are in metres and t in seconds. Choose the wrong statement:

In a plane progressive harmonic wave particle speed is always less than the wave speed if:
(where A is wavelength of wave)

Which of the following is not the standard form of a sine wave?

String 1 has twice the length, twice the radius, twice the tension and twice the density of another string 2. The relation between the fundamental frequencies of 1 and 2 is :

A string of length L is stretched by L/20 and speed of transverse wave along it is v. The speed of wave when it is stretched by L/10 will be : (assume the Hooke’s law is applicable)

Speed of transverse wave in a string of density 100 kglm³ and area of cross-section 10 mm² under the tension of 10³ N is :

A wave represented by the equation y1 = Acos(kx- ωt), is superimposed with another wave to form a stationary wave such that the point x = 0 is a node. The equation of the other wave is :

The frequency changes by 10% as the source approaches a stationary observer with constant speed v_s. What would be the percentage change in frequency as the source recedes the observer with the same speed ? Given, that v_s « v ( v = speed of sound in air)

A heavy rope is suspended from a rigid support. A wave pulse is set up at the lower end, then :

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Waves MCQ Level Bank Exams General Awareness MCQs & solutions - Free

MCQ Practice Test & Solutions: Waves MCQ Level (10 Questions)

The equation of a wave disturbance is given as : where X and y are in metres and t in seconds. Choose the wrong statement:

In a plane progressive harmonic wave particle speed is always less than the wave speed if: (where A is wavelength of wave)

Which of the following is not the standard form of a sine wave?

String 1 has twice the length, twice the radius, twice the tension and twice the density of another string 2. The relation between the fundamental frequencies of 1 and 2 is :

A string of length L is stretched by L/20 and speed of transverse wave along it is v. The speed of wave when it is stretched by L/10 will be : (assume the Hooke’s law is applicable)

Speed of transverse wave in a string of density 100 kglm3 and area of cross-section 10 mm2 under the tension of 103 N is :

A wave represented by the equation y1 = Acos(kx- ωt), is superimposed with another wave to form a stationary wave such that the point x = 0 is a node. The equation of the other wave is :

The frequency changes by 10% as the source approaches a stationary observer with constant speed vs. What would be the percentage change in frequency as the source recedes the observer with the same speed ? Given, that vs « v ( v = speed of sound in air)

A heavy rope is suspended from a rigid support. A wave pulse is set up at the lower end, then :

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The equation of a wave disturbance is given as :
where X and y are in metres and t in seconds. Choose the wrong statement:

In a plane progressive harmonic wave particle speed is always less than the wave speed if:
(where A is wavelength of wave)

Speed of transverse wave in a string of density 100 kglm³ and area of cross-section 10 mm² under the tension of 10³ N is :

The frequency changes by 10% as the source approaches a stationary observer with constant speed v_s. What would be the percentage change in frequency as the source recedes the observer with the same speed ? Given, that v_s « v ( v = speed of sound in air)