Waves Test

Result

Waves Test - 4

Score
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Weekly Quiz Competition

Question 1
4 / -1

A metallic wire of 1 m length has a mass of 10 × 10^-3 kg. If a tension of 100 N is applied to a wire, what is the speed of transverse wave?

A
100 ms^-1

B
10 ms^-1

C
200 ms^-1

D
0.1 ms^-1

Solution
Question 2
4 / -1

A wave represented by the equation y = a cos (kx - ωt) is superposed with another wave to form a stationary wave such that point x = 0 is a node. The equation for the other wave is

A
a sin (kx + ωt)

B
– a cos (kx - ωt)

C
– a cos (kx + ωt)

D
– a sin (kx - ωt)
Question 3
4 / -1

Which quantity is transmitted with propagation of longitudinal waves through a medium?

A
Dispersion

B
Energy

C
Matter

D
Frequency
Question 4
4 / -1

A string of mass 3 kg is under tension of 400 N. The length of the stretched string is 25 cm. If the transverse jerk is stuck at one end of the string, how long does the disturbance take to reach the other end?

A
0.047 s

B
0.055 s

C
0.034 s

D
0.065 s
Question 5
4 / -1

A sonometer wire of length 1.5 m is made of steel. The tension in it produces an elastic strain of 1%. What is the fundamental frequency of steel if density and elasticity of steel are 7.7 × 10³ kg / m³ and 2.2 × 10¹¹ N / m² respectively?

A
188.5 Hz

B
178.2 Hz

C
200.5 Hz

D
770 Hz

Solution
Question 6
4 / -1

A string of density 7.5 g cm^-3 and area of cross-section 0.2 mm² is stretched under a tension of 20 N. When it is plucked at the mid-point, the speed of the transverse wave on the wire is

A
116 ms^-1

B
40 ms^-1

C
200 ms^-1

D
80 ms^-1

Solution
Question 7
4 / -1

A

B

C

D
Question 8
4 / -1

When two waves of nearly equal frequencies v₁ and v₂ are produced simultaneously, the time interval between successive maxima is

A

B

C

D
Question 9
4 / -1

Two Cu wires of radii R₁ and R₂, such that (R₁ > R₂ ). Then which of the following is true?

A
Transverse wave travels faster in thicker wire

B
Transverse wave travels faster in thinner wire

C
Travels with the same speed in both the wires

D
Does not travel
Question 10
4 / -1

The frequency and velocity of sound wave are 600 Hz and 360 m/s respectively. Phase difference between two particles of medium are 60°, the minimum distance between these two particles will be

A
10 cm

B
15 cm

C
20 cm

D
50 cm