Default Title

Question (11)

QN0038665

The wavelength of two waves are 50 and respectively. If the temperature of the room is then what will be the number of beats produced per second by these waves, when the speed of sound at is ?

(A)
24
(B)
14
(C)
10
(D)
none of these

Correct Answer: B

Explanation:

.

No. of beats

Link:

Report Error

Question (12)

QN0038666

A tuning fork arrangement (pair) produces 4 beats with one fork of frequency . A little wax is placed on the unknown fork and it then produces 2 beats/sec. The frequency of the unknown fork is

(A)
(B)
(C)
(D)

Correct Answer: B

Explanation:

A tuning fork produces 4 beats/sec with another tuning fork of frequency . From this information we can conclude that the frequency of unknown fork is or i.e. or . When a little wax is placed on the unknown fork, it produces 2 beats/ sec. When a little wax is placed on the unknown fork, its frequency decreases and simultaneously the beat frequency decreases confirming that the frequency of the unknown fork is .

Link:

Report Error

Question (13)

QN0038667

A source of sound gives 5 beats per second when sounded with another source of frequency 100 per second. The second harmonic of the source, together with a source of frequency 205 per second gives 5 beats per second. What is the frequency of the source?

(A)
(B)
(C)
(D)

Correct Answer: C

Explanation:

Link:

Report Error

Question (14)

QN0038668

A tuning fork of frequency makes 4 beats per second with the vibrating string of a piano. The beat frequency decreases to 2 beats per sec when the tension in the piano string is slightly increased. The frequency of the piano string before increasing the tension was

(A)
(B)
(C)
(D)

Correct Answer: D

Explanation:

The frequency of the piano string or 508. When the tension is increased, beat frequency decreases to 2, it means that frequency of the string is 508 as frequency of string increases with tension.

Link:

Report Error

Question (15)

QN0038669

The musical interval between two tones of frequencies and is:

(A)
80
(B)
560
(C)
(D)

Correct Answer: D

Explanation:

Link:

Report Error

Question (16)

QN0038670

The correct figure that shows, schematically, the wave pattern produced by superposition of two waves of frequencies and is :

(A)
(B)
(C)
(D)

Correct Answer: C

Explanation:

Beat frequency

difference in frequencies of two waves

Link:

Report Error

Question (17)

QN0038671

The velocity of sound in a gas in which two wavelengths and produce 40 beats in , will be :

(A)
(B)
(C)
(D)

Correct Answer: D

Explanation:

Beat frequency

Link:

Report Error

Question (11)

The wavelength of two waves are 50 and respectively. If the temperature of the room is then what will be the number of beats produced per second by these waves, when the speed of sound at is ?

Explanation:

Link:

Question (12)

A tuning fork arrangement (pair) produces 4 beats with one fork of frequency . A little wax is placed on the unknown fork and it then produces 2 beats/sec. The frequency of the unknown fork is

Explanation:

Link:

Question (13)

A source of sound gives 5 beats per second when sounded with another source of frequency 100 per second. The second harmonic of the source, together with a source of frequency 205 per second gives 5 beats per second. What is the frequency of the source?

Explanation:

Link:

Question (14)

A tuning fork of frequency makes 4 beats per second with the vibrating string of a piano. The beat frequency decreases to 2 beats per sec when the tension in the piano string is slightly increased. The frequency of the piano string before increasing the tension was

Explanation:

Link:

Question (15)

The musical interval between two tones of frequencies and is:

Explanation:

Link:

Question (16)

The correct figure that shows, schematically, the wave pattern produced by superposition of two waves of frequencies and is :

Explanation:

Link:

Question (17)

The velocity of sound in a gas in which two wavelengths and produce 40 beats in , will be :

Explanation:

Link:

Excel With Tutors

ExcelWithTutors

For Student

For Tutors

Learn

OUR POLICY