CH 14 Physics Class 11 NCERT Solutions. We covered all the CH 14 Physics Class 11 NCERT Solutions in this post for free so that you can practice well for the exam.
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CH 14 Physics Class 11 NCERT Objective with Solutions for Students
Calculate the time period (in seconds) of a sound wave with a wavelength of 5 meters traveling at a speed of 500 m/s.
(a) 0.01
(b) 2500
(c) 0.02
(d) 250
Option a – 0.01
Which one of the following statements is not correct?
(a) Ultrasonic waves cannot get reflected, refracted, or absorbed.
(b) Ultrasonic waves are used to detect the presence of defects like cracks, porosity, etc., in the internal structure of common structural materials.
(c) Ultrasonic waves can be used for making holes in very hard materials like diamonds.
(d) Ultrasonic waves cannot travel through a vacuum.
Option a – Ultrasonic waves cannot get reflected, refracted, or absorbed
Bats detect obstacles in their path by receiving the reflected
(a) infrasonic waves
(b) ultrasonic waves
(c) radio waves
(d) microwaves
Option b – ultrasonic waves
The speed of sound is faster in
(a) solids
(b) liquids
(c) gases
(d) vacuum
Option a – solids
The sound will have the highest velocity in
(a) vacuum
(b) air
(c) water
(d) steel
Option d – steel
At 20°C, the speed of sound in water is approximately
(a) 330 m/s
(b) 800 m/s
(c) 1500 m/s
(d) 5000 m/s
Option c – 1500 m/s
We covered all the ch 14 physics class 11 ncert solutions above in this post for free so that you can practice well for the exam.
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