## A pipe 20 cm long is closed at one end. Which harmonic mode of the pipe is resonantly excited by a 430 Hz source? Will the same source be in resonance with the pipe if both ends are open? | Learn NCERT solution | Education portal Class 11 Physics | Study online Unit-15 Waves

Q.17:- A pipe 20 cm long is closed at one end. Which harmonic mode of the pipe is resonantly excited by a 430 Hz source? Will the same source be in…

## A steel rod 100 cm long is clamped at its middle. The fundamental frequency of longitudinal vibrations of the rod is given to be 2.53 kHz. What is the speed of sound in steel? | Learn NCERT solution | Education portal Class 11 Physics | Study online Unit-15 Waves

Q.16:- A steel rod 100 cm long is clamped at its middle. The fundamental frequency of longitudinal vibrations of the rod is given to be 2.53 kHz. What is the speed…

## A metre-long tube open at one end, with a movable piston at the other end, shows resonance with a fixed frequency source (a tuning fork of frequency 340 Hz) when the tube length is 25.5 cm or 79.3 cm. Estimate the speed of sound in air at the temperature of the experiment. The edge effects may be neglected. | Learn NCERT solution | Education portal Class 11 Physics | Study online Unit-15 Waves

Q.15:- A metre-long tube open at one end, with a movable piston at the other end, shows resonance with a fixed frequency source (a tuning fork of frequency 340 Hz) when…

## A wire stretched between two rigid supports vibrates in its fundamental mode with a frequency of 45 Hz. The mass of the wire is 3.5 × 10–2 kg and its linear mass density is 4.0 × 10–2 kg m–1. What is (a) the speed of a transverse wave on the string, and (b) the tension in the string? | Learn NCERT solution | Education portal Class 11 Physics | Study online Unit-15 Waves

Q.14:- A wire stretched between two rigid supports vibrates in its fundamental mode with a frequency of 45 Hz. The mass of the wire is 3.5 × 10–2 kg and its…

## Given below are some functions of x and t to represent the displacement (transverse or longitudinal) of an elastic wave. State which of these represent (i) a traveling wave, (ii) a stationary wave or (iii) none at all: (a) y = 2 cos (3x) sin (10t) (b) y = 2 √x – vt (c) y = 3 sin (5x – 0.5t) + 4 cos (5x – 0.5t) (d) y = cos x sin t + cos 2x sin 2t | Learn NCERT solution | Education portal Class 11 Physics | Study online Unit-15 Waves

Q.13:- Given below are some functions of x and t to represent the displacement (transverse or longitudinal) of an elastic wave. State which of these represent (i) a traveling wave,…

## For the wave on a string described in Exercise 15.11, do all the points on the string oscillate with the same (a) frequency, (b) phase, (c) amplitude? Explain your answers. (ii) What is the amplitude of a point 0.375 m away from one end? | Learn NCERT solution | Education portal Class 11 Physics | Study online Unit-15 Waves

Q.12:- (i)For the wave on a string described in Exercise 15.11, do all the points on the string oscillate with the same (a) frequency, (b) phase, (c) amplitude? Explain your…

## The transverse displacement of a string (clamped at its both ends) is given by Where x and y are in m and t in s. The length of the string is 1.5 m and its mass is 3.0 ×10–2 kg. Answer the following: (a) Does the function represent a travelling wave or a stationary wave? (b) Interpret the wave as a superposition of two waves travelling in opposite directions. What is the wavelength, frequency, and speed of each wave? (c) Determine the tension in the string. | Learn NCERT solution | Education portal Class 11 Physics | Study online Unit-15 Waves

Q.11:- The transverse displacement of a string (clamped at its both ends) is given by Where x and y are in m and t in s. The length of the string…

## For the travelling harmonic wave y (x, t) = 2.0 cos 2π (10t – 0.0080x + 0.35) Where x and y are in cm and t in s. Calculate the phase difference between oscillatory motion of two points separated by a distance of (a) 4 m, (b) 0.5 m, (c) λ/2 (d) 3λ/4 | Learn NCERT solution | Education portal Class 11 Physics | Study online Unit-15 Waves

Q.10:- For the travelling harmonic wave y (x, t) = 2.0 cos 2π (10t – 0.0080x + 0.35) Where x and y are in cm and t in s. Calculate the…