The frequency of fundamental tone in an open organ pipe of length 0.48 m is 320 Hz. The speed of sound is 320 m/sec. Frequency of fundamental tone in closed organ pipe will be : 

1. 153.8 Hz

2. 160.0 Hz

3. 320.0 Hz

4. 143.2 Hz

What is the minimum length of a tube, open at both ends, that resonates with tuning fork of frequency 350 Hz? [velocity of sound in air = 350 m/s] 

1. 50 cm

2. 100 cm

3. 75 cm

4. 25 cm

The harmonics which are present in a pipe open at one end are :

1. Odd harmonics

2. Even harmonics

3. Even as well as odd harmonics

4. None of these

The stationary wave $y=2a\sin kx\cos \omega t$ in a closed organ pipe is the result of the superposition of $y=a\sin (\omega t-kx)$ and

(1) $y=-a\cos (\omega t+kx)$

(2) $y=-a\sin (\omega t+kx)$

(3) $y=a\sin (\omega t+kx)$

(4) $y=a\cos (\omega t+kx)$

An open pipe of length l vibrates in the fundamental mode. The pressure variation is maximum at :

(1) l/4 from ends

(2) The middle of the pipe

(3) The ends of the pipe

(4) At l/8 from ends of pipe

The fundamental frequency of pipe is 100 Hz and the other two frequencies are 300 Hz and 500 Hz then :

(1) The pipe is open at both the ends

(2) The pipe is closed at both the ends

(3) One end open and another end is closed

(4) None of the above

The fundamental frequency of an open pipe of length 0.5 m is equal to the frequency of the first overtone of a closed pipe of length l. The value of l_c is (m) :

(1) 1.5

(2) 0.75

(3) 2

(4) 1

In a closed organ pipe, the frequency of the fundamental note is 50 Hz. The note of which of the following frequencies will not be emitted by it :

(1) 50 Hz

(2) 100 Hz

(3) 150 Hz

(4) None of the above

On producing the waves of frequency 1000 Hz in a Kundt's tube, the total distance between 6 successive nodes is 85 cm. Speed of sound in the gas filled in the tube is 

(1) 330 m/s

(2) 340 m/s

(3) 350 m/s

(4) 300 m/s

What is the base frequency if a pipe gives notes of frequencies 425, 255 and 595 and decide whether it is closed at one end or open at both ends :

(1) 17, closed

(2) 85, closed

(3) 17, open

(4) 85, open