Waves Test

Result

Waves Test - 76

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Weekly Quiz Competition

Question 1
4 / -1

The figure shows four progressive waves A, B, C, and D with their phases expressed with respect to the wave A. It can be concluded from the figure that

A
The wave C is ahead by a phase angle of π/ 2 and the wave B lags behind by a phase angle of π /2

B
The wave C lags behind by a phase angle of π /2 and the wave B is ahead by a phase angle of π /2

C
The wave C is ahead by a phase angle of π and the wave B lags behind by a phase angle of π

D
The wave C lags behind by a phase angle of π0020and the wave B ahead by a phase angle of π

Solution
Question 2
4 / -1

The diagram below shows the propagation of a wave. Which points are in same phase?

A
F, G

B
C and E

C
B and G

D
B and F

Solution
Question 3
4 / -1

A
(a)

B
(b)

C
(c)

D
(d)

Solution
Question 4
4 / -1

Figure here shows an incident pulse P reflected from a rigid support. Which one of A, B, C, D represents the reflected pulse correctly?

A

B

C

D
Question 5
4 / -1

Which of the following curves represents correctly the oscillation given by y = y₀ sin (ωt – ɸ), where 0 < ɸ < 90?

A
A

B
B

C
C

D
D

Solution
Question 6
4 / -1

The correct graph between the frequency n and square root of density (ρ) of a wire, keeping its length, radius and tension constant, is

A

B

C

D

Solution
Question 7
4 / -1

A sound source emits sound waves in a uniform medium. If energy density is E and maximum speed of the particles of the medium is v_max .The plot between E and v_max is best represented by

A

B

C

D

Solution
Question 8
4 / -1

If the speed of the wave shown in the figure is 330m/s in the given medium, then the equation of the wave propagating in the positive x-direction will be (all quantities are in M.K.S. units)

A
y = 0.05 sin 2π (4000 t – 12.5x)

B
y = 0.5 sin 2π (4000 t – 122.5 x)

C
y = 0.05 sin 2π (3300 t – 10 x)

D
y = 0.05 sin 2π (3300 x – 10 t)

Solution
Question 9
4 / -1

Two pulses travel in mutually opposite directions in a string with a speed of 2.5 cm/s as shown in the figure. Initially the pulses are 10 cm apart. What will be the state of the string after two seconds?

A

B

C

D

Solution
Question 10
4 / -1

Two tuning forks P and Q are vibrated together. The number of beats produced are represented by the straight line OA in the following graph. After loading Q with wax again these are vibrated together and the beats produced are represented by the line OB. If the frequency of P is 341Hz, the frequency of Q will be

A
341 Hz

B
338 Hz

C
344 Hz

D
None of these

Solution