Waves Test

Result

Waves Test - 57

Score
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Weekly Quiz Competition

Question 1
4 / -1

A string fixed at both the ends is vibrating in two segments. The wavelength of the corresponding wave is

A

B

C

D

Solution
Question 2
4 / -1

A 1 cm long string vibrates with fundamental frequency of 256 Hz. If the length is reduced to 1/4 cm keeping the tension unaltered, the new fundamental frequency will be

A
64

B
256

C
512

D
1024

Solution
Question 3
4 / -1

The velocity of waves in a string fixed at both ends is 2 m/s. The string forms standing waves with nodes 5.0 cm apart. The frequency of vibration of the string in Hz is

A
40

B
30

C
20

D
10

Solution
Question 4
4 / -1

Which of the following is the example of transverse wave?

A
Sound waves

B
Compressional waves in a spring

C
Vibration of string

D
All of the above
Question 5
4 / -1

Two similar sonometer wires given fundamental frequencies of 500 Hz. These have same tensions. By what amount the tension be increased in one wire so that the two wires produce 5 beats/sec?

A
1%

B
2%

C
3%

D
4%

Solution
Question 6
4 / -1

If the tension of sonometer\'s wire increases four times then the fundamental frequency of the wire will increase by

A
2 times

B
4 times

C
1/2 times

D
None of these

Solution
Question 7
4 / -1

Four wires of identical length, diameters and of the same material are stretched on a sonometre wire. If the ratio of their tensions is 1 : 4 : 9 : 16 then the ratio of their fundamental frequencies are

A
16 : 9 : 4 : 1

B
4 : 3 : 2 : 1

C
1 : 4 : 2 : 16

D
1 : 2 : 3 : 4

Solution
Question 8
4 / -1

A tuning fork vibrating with a sonometer having 20 cm wire produces 5 beats per second. The beat frequency does not change if the length of the wire is changed to 21 cm. The frequency of the tuning fork (in Hertz) must be

A
200

B
210

C
205

D
215

Solution
Question 9
4 / -1

If you set up the seventh harmonic on a string fixed at both ends, how many nodes and antinodes are set up in it?

A
8, 7

B
7, 7

C
8, 9

D
9, 8

Solution
Question 10
4 / -1

If you set up the ninth harmonic on a string fixed at both ends, its frequency compared to the seventh harmonic

A
Higher

B
Lower

C
Equal

D
None of these