Physics-
General
Easy
Question
Four open organ pipes of different length and different gases at same temperature as shown in figure. Let fA , fB , fC and fD be their fundamental frequencies then:–
The correct answer is:
Related Questions to study
Physics-
A clamped string is oscillating in nth harmonic, then:–
A clamped string is oscillating in nth harmonic, then:–
Physics-General
Physics-
Two trains A and B are moving in the same direction with velocities 30 m/s and 10 m/s respectively, B is behind from A, blows a horn of frequency 450 Hz. Then the apparent frequency heard by B is (The velocity of sound is 330 m/s):–
Two trains A and B are moving in the same direction with velocities 30 m/s and 10 m/s respectively, B is behind from A, blows a horn of frequency 450 Hz. Then the apparent frequency heard by B is (The velocity of sound is 330 m/s):–
Physics-General
Physics-
A closed organ pipe of radius r1 and an open organ pipe of radius r2 and having same length 'L' resonate when excited with a given tuning fork. Closed organ pipe resonates in its fundamental mode where as open organ pipe resonates in its first overtone, then:
A closed organ pipe of radius r1 and an open organ pipe of radius r2 and having same length 'L' resonate when excited with a given tuning fork. Closed organ pipe resonates in its fundamental mode where as open organ pipe resonates in its first overtone, then:
Physics-General
Physics-
A cylindrical tube (L = 120 cm.) is in resonance with a tuning fork of frequency 330 Hz. If it is filling by water then to get resonance again, minimum length of water column is (vair = 330 m/s):–
A cylindrical tube (L = 120 cm.) is in resonance with a tuning fork of frequency 330 Hz. If it is filling by water then to get resonance again, minimum length of water column is (vair = 330 m/s):–
Physics-General
Physics-
A wave is represented by the equation y = a sin(kx – wt) is superimposed with another wave to form a stationary wave such that the point x = 0 is a node. Then the equation of other wave is:–
A wave is represented by the equation y = a sin(kx – wt) is superimposed with another wave to form a stationary wave such that the point x = 0 is a node. Then the equation of other wave is:–
Physics-General
Physics-
A copper wire is fixed between two rigid supports. It is stretched with negligible tension at 30°C. The speed of transverse waves in the wire at 10°C will be– (density d = 9 × 103 kg/m3 , Young's modulus Y = 1.3 × 1011 N/m² and temperature coefficient of expansion a = 1.7 × 10–5 /°C):–
A copper wire is fixed between two rigid supports. It is stretched with negligible tension at 30°C. The speed of transverse waves in the wire at 10°C will be– (density d = 9 × 103 kg/m3 , Young's modulus Y = 1.3 × 1011 N/m² and temperature coefficient of expansion a = 1.7 × 10–5 /°C):–
Physics-General
Chemistry-
The correct order of case of dehydration of following is:
I) 
II) 
III) 
The correct order of case of dehydration of following is:
I)
II)
III)
Chemistry-General
Chemistry-
The 
reactivity of the following halides will be in the order:
i) 
ii) 
iii) 
iv) 
v) 
The reactivity of the following halides will be in the order:
i)
ii)
iii)
iv)
v)
Chemistry-General
Physics-
Two wave are represented by equation y1 = a sin wt and y2 = a cos wt the first wave:–
Two wave are represented by equation y1 = a sin wt and y2 = a cos wt the first wave:–
Physics-General
Physics-
You are given four tuning forks, the lowest frequency of the forks is 300 Hz. By striking two tuning forks at a time any of 1, 2, 3, 5, 7 & 8 Hz beat frequencies are heard. The possible frequencies of the other three forks are-
You are given four tuning forks, the lowest frequency of the forks is 300 Hz. By striking two tuning forks at a time any of 1, 2, 3, 5, 7 & 8 Hz beat frequencies are heard. The possible frequencies of the other three forks are-
Physics-General
Physics-
Two strings, A and B, of lengths 4L and L respectively and same mass M each, are tied together to form a knot 'O' and stretched under the same tension. A transverse wave pulse is sent along the composite string from the side A, as shown to the right. Which of the following diagrams correctly shows the reflected and transmitted wave pulses near the knot 'O'?
Two strings, A and B, of lengths 4L and L respectively and same mass M each, are tied together to form a knot 'O' and stretched under the same tension. A transverse wave pulse is sent along the composite string from the side A, as shown to the right. Which of the following diagrams correctly shows the reflected and transmitted wave pulses near the knot 'O'?
Physics-General
Physics-
A standing wave is created on a string of length 120 m and it is vibrating in 6th harmonic. Maximum possible amplititude of any particle is 10 cm and maximum possible velocity will be 10 cm/s. Choose the correct statement.
A standing wave is created on a string of length 120 m and it is vibrating in 6th harmonic. Maximum possible amplititude of any particle is 10 cm and maximum possible velocity will be 10 cm/s. Choose the correct statement.
Physics-General
Physics-
A small block of mass m is fixed at upper end of a massless vertical spring of spring constant 
and natural length '10L'. The lower end of spring is free and is at a height L from fixed horizontal floor as shown in the figure. The spring is initially unstressed and the springblock system is released from rest from shown position.As the block is coming down, the maximum speed attained by the block is
A small block of mass m is fixed at upper end of a massless vertical spring of spring constant and natural length '10L'. The lower end of spring is free and is at a height L from fixed horizontal floor as shown in the figure. The spring is initially unstressed and the springblock system is released from rest from shown position.As the block is coming down, the maximum speed attained by the block is
Physics-General
Physics-
The coefficient of friction between blocks of mass m and 2m is m = 2 tan q. There is no friction between block of mass 2m and inclined plane. The maximum amplitude of two block system for which there is no relative motion between the blocks.
The coefficient of friction between blocks of mass m and 2m is m = 2 tan q. There is no friction between block of mass 2m and inclined plane. The maximum amplitude of two block system for which there is no relative motion between the blocks.
Physics-General
Physics-
For a particle executing SHM the displacement x given by x = Acoswt. Identify the graph which represents the variation of potential energy (PE) as a function of time t and displacement x :-
For a particle executing SHM the displacement x given by x = Acoswt. Identify the graph which represents the variation of potential energy (PE) as a function of time t and displacement x :-
Physics-General
