Waves Test

Result

Waves Test - 47

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Weekly Quiz Competition

Question 1
4 / -1

When a longitudinal wave propagates through a medium, the particles of the medium execute simple harmonic oscillations about their mean positions. These oscillations of a particle are characterized by an invariant

A
Kinetic energy

B
Potential energy

C
Sum of kinetic energy and potential energy

D
Difference between kinetic energy and potential energy
Question 2
4 / -1

A

B

C

D

Solution
Question 3
4 / -1

Wave equations of two particles are given by y₁= a sin (ωt – kx), y₂ = a sin (kx + ωt), then

A
They are moving in opposite direction

B
Phase between them is 90°

C
Phase between them is 180°

D
Phase between them is 0°
Question 4
4 / -1

A wave is represented by the equation y = 0.5 sin (10 t – x) m. It is a travelling wave propagating along the +x direction with velocity

A
10 m/s

B
20 m/s

C
5 m/s

D
None of these

Solution
Question 5
4 / -1

A transverse progressive wave on a stretched string has a velocity of 10 ms^–1 and a frequency of 100 Hz. The phase difference between two particles of the string which are 2.5 cm apart will be

A
π/8

B
π/ 4

C
3 π/8

D
π/2

Solution
Question 6
4 / -1

A travelling wave in a stretched string is described by the equation y = A sin (kx – ωt). The maximum particle velocity is

A
Aω

B
ω/k

C
dω/dk

D
x/t

Solution
Question 7
4 / -1

The particles of a medium vibrate about their mean positions whenever a wave travels through that medium. The phase difference between the vibrations of two such particles

A
Varies with time

B
Varies with distance separating them

C
Varies with time as well as distance

D
Is always zero
Question 8
4 / -1

A
100 Hz, 4.7 × 10³ cm/s²

B
50 Hz, 7.5 × 10³ cm/s²

C
25 Hz, 4.7 × 10⁴ cm/s²

D
25 Hz, 7.4 × 10⁴ cm/s²

Solution
Question 9
4 / -1

A
v = 5 m/sec

B
λ = 18 m

C
a = 0.04 m

D
n = 50 Hz

Solution
Question 10
4 / -1

With the propagation of a longitudinal wave through a material medium, the quantities transmitted in the propagation direction are

A
Energy, momentum and mass

B
Energy

C
Energy and mass

D
Energy and linear momentum