Question

Length of resonance tube is 150 cm minimum level of liquid in resonance condition for wave having wavelength it is m is

Answer 1

The possible resonance for wave will be 3.

Explanation:

Correct statement:

Length of resonance tube is 150 cm how many resonance are possible for a wave having frequency 400 hertz and speed of sound is 320 metre per second ?

Solution:

• Frequency = 400 hertz
• Sound velocity = 320 m/s
• Length of tube = 150 cm

We need to calculate the wavelength

Using formula of wavelength

λ = v / f

Put the value into the formula

λ = 320 / 400 = 0.8 m = 80 cm

We need to calculate the number of resonance

Using formula of number of resonance

• For one loop

L=  λ / 2

L= 80 / 2 =40 cm

• For second loop

L = λ / 2 = 2 x 80 / 2 = 80 cm

• For third loop

L = λ / 2  = 3 x 80 / 2 = 120 cm

• For fourth loop

L = λ / 2 = 120 x 4 / 2 = 160 cm

Here, the length of the tube is 150 cm so neglect of the fourth loop.

Hence, The possible resonance for wave will be 3.