This quiz works best with JavaScript enabled. Home > Class 11 > Class 11 Physics (Part I) Chapter 10 Oscillations And Waves – Quiz 1 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Physics (Part I) Chapter 10 Oscillations And Waves Quiz 1 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. An object attached to an ideal spring executes simple harmonic motion. If you want to double its total energy, you could A) Double the amplitude of vibration. B) Double the force constant (spring constant) of the spring. C) Double both the amplitude and force constant (spring constant). D) Double the mass. Show Answer Correct Answer: B) Double the force constant (spring constant) of the spring. 2. The speed of sound in air is about ..... A) 30 m/s. B) 300 m/s. C) 30 000 m/s. D) 300 00 0m/s. Show Answer Correct Answer: B) 300 m/s. 3. Un pendolo compie oscillazioni armoniche di periodo T. Se sostituisci la massa con una doppia, il periodo dell'oscillazione: A) Raddoppia. B) Si dimezza. C) Diventa un quarto. D) Rimane invariato. Show Answer Correct Answer: D) Rimane invariato. 4. Select the example of a longitudinal wave. A) Radio wave. B) Light wave. C) Sound wave. D) None of the above. Show Answer Correct Answer: C) Sound wave. 5. Which equation gives the condition for constructive interference in a double-slit experiment? A) $d \sin \theta = m\lambda$. B) $d \sin \theta = (m+\frac{1}{2})\lambda$. C) $d\cos \theta = m\lambda$. D) $d \tan \theta = m\lambda$. Show Answer Correct Answer: A) $d \sin \theta = m\lambda$. 6. Which characteristic of the sound wave is related to loudness? A) Frequency. B) Amplitude. C) Pitch. D) Wavelength. Show Answer Correct Answer: B) Amplitude. 7. A net force of 430 N acts to stretch an extension spring. How far will the spring stretch if its spring constant is 700 N/m? A) $0.614$. B) 0.614 Mathematical EquivalenceON. C) All the above. D) None of the above. Show Answer Correct Answer: A) $0.614$. 8. What is the result when two waves have a phase difference of 180$^\circ$? A) They amplify each other. B) They cancel each other out. C) They create a new wave. D) They double in intensity. Show Answer Correct Answer: B) They cancel each other out. 9. Amplitude affects which characteristic of sound waves? A) Frequency. B) Pitch. C) Loudness. D) Wave speed. Show Answer Correct Answer: C) Loudness. 10. Displacement is measured in ..... A) Metres. B) Hertz. C) Seconds. D) Metres per second. Show Answer Correct Answer: A) Metres. 11. What force should be applied to compress a spring by 0.013 m if its spring constant is k = 1900 N/m? A) 1880 N. B) 24.7 N. C) 1900 N. D) 0.127 N. Show Answer Correct Answer: B) 24.7 N. 12. A wave has wavelength of 10 m and a speed of 340 m/s. What is the frequency of the wave? A) 34 m/s. B) 3400 Hz. C) 3.4 Hz. D) 34 Hz. Show Answer Correct Answer: D) 34 Hz. 13. By which of the following is sound produced? A) Rectillinear Motion. B) Electromagnetic Waves. C) Oscillations. D) Hitting your head against a pillow. Show Answer Correct Answer: C) Oscillations. 14. If the frequency of an oscillating body is 6 HZ, the periodic time is ..... sec. A) $\frac{1}{3}$. B) 3. C) $\frac{1}{6}$. D) 6. Show Answer Correct Answer: C) $\frac{1}{6}$. 15. A wave has an amplitude of 58 cm. It has a period of 0.43 seconds. What is the angular velocity (w)? A) 2.70 rad/s. B) 3.97 rad/s. C) 14.612 rad/s. D) 58.0 rad/s. Show Answer Correct Answer: C) 14.612 rad/s. 16. When a train is approaching the station, the waves are ..... increasing the ..... and ..... A) Expanded, frequency and pitch. B) Compressed, amplitude and pitch. C) Compressed, frequency and pitch. D) Expanded, pitch and amplitude. Show Answer Correct Answer: C) Compressed, frequency and pitch. 17. The ..... of a sound depends on the medium through which it's moving. A) Pitch. B) Vibration. C) Speed. D) Loudness. Show Answer Correct Answer: C) Speed. 18. The phenomenon of a wave bouncing off a surface is called ..... A) Refraction. B) Reflection. C) Rarefaction. D) Interference. Show Answer Correct Answer: B) Reflection. 19. A 0.35 kg block attached to a spring undergoes simple harmonic motion with a period of 0.85 s. What is the spring constant? A) 19.1 N/m. B) 13.2 N/m. C) 0.95 N/m. D) 3.34 N/m. Show Answer Correct Answer: A) 19.1 N/m. 20. Which force (s) is (are) present in case of damped oscillation? A) Restoring force. B) Damping force. C) Both restoring force and damping force. D) Restoring force, damping force and external periodic force. Show Answer Correct Answer: C) Both restoring force and damping force. 21. In any system in SHM, the restoring force acting on the mass in the system is proportional to A) The displacement. B) The length of the pendulum. C) The mass. D) The frequency. Show Answer Correct Answer: A) The displacement. 22. A force of 30 N stretches a very light ideal spring 0.73 m from equilibrium. (a) What is the force constant (spring constant) of the spring?(b) Find the maximum velocity after releasing. (c) What will be the angular frequency of the spring during oscillation?(d) Determine the wavelength of the system. A) $41.095$. B) 41.095 Mathematical EquivalenceON. C) All the above. D) None of the above. Show Answer Correct Answer: A) $41.095$. 23. Which one is correct, in case of oscillation? A) Displacement and restoring force are in the same direction. B) Displacement is always away from mean position where as restoring force is always towards the mean position. C) Displacement is always towards the mean position where as restoring force is always away from the mean position. D) The direction of displacement and restoring force is random. Show Answer Correct Answer: B) Displacement is always away from mean position where as restoring force is always towards the mean position. 24. What are the parts of a longitudinal wave? A) Compressions and rarefactions. B) Crests and troughs. C) Compressions and crests. D) Rarefactions and troughs. Show Answer Correct Answer: A) Compressions and rarefactions. 25. A pair of trapeze performers at the circus is swinging from ropes attached to a large elevated platform. Suppose that the performers can be treated as a simple pendulum with a length of 16 m. Determine the period for one complete back and forth cycle. A) 2 sec. B) 12 sec. C) 8 sec. D) 10 sec. Show Answer Correct Answer: C) 8 sec. 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