This quiz works best with JavaScript enabled. Home > Class 11 > Class 11 Physics (Part I) Chapter 10 Oscillations And Waves – Quiz 7 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Physics (Part I) Chapter 10 Oscillations And Waves Quiz 7 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The period of a pendulum may be decreased by ..... A) Increasing the mass of the bob. B) Decreasing the mass of the bob. C) Moving the equilibrium point. D) Shortening the length of pendulum. Show Answer Correct Answer: D) Shortening the length of pendulum. 2. Wave period means ..... A) The highest point above the rest position. B) The time taken for a full cycle of the wave. C) The maximum displacement of a point of a wave from its rest position. D) The number of waves passing a point each second. Show Answer Correct Answer: B) The time taken for a full cycle of the wave. 3. All of the following are examples of oscillatory motion except ..... A) Motion of string. B) Motion of tuning fork. C) Motion of car. D) Motion of simple pendulum. Show Answer Correct Answer: C) Motion of car. 4. A mass oscillates on a spring hanging from the ceiling that has a spring constant, k, of 200 N/m and a natural frequency of 2.5 Hz. If the speed of the mass is 3.8 m/s as it moves through its equilibrium position, what is the maximum displacement of the spring (in cm)? A) $24$. B) 24 Mathematical EquivalenceON. C) All the above. D) None of the above. Show Answer Correct Answer: A) $24$. 5. Which wave property changes when a sound wave goes from air into water? A) Frequency. B) Wavelength. C) Speed and wavelength. D) Speed and frequency. Show Answer Correct Answer: C) Speed and wavelength. 6. When an oscillating mass passes its equilibrium position the resultant force is ..... so that its acceleration is ..... A) Maximum, minimun. B) Minimum, maximun. C) Zero, zero. D) None of these. Show Answer Correct Answer: C) Zero, zero. 7. Short Answer:In a coupled oscillator system, what is the beat frequency if two oscillators have frequencies $f_1$ $f_2$ A) $f_1 + f_2$. B) $|f_1-f_2|$. C) $2(f_1 + f_2)$. D) $f_1 f_2$. Show Answer Correct Answer: B) $|f_1-f_2|$. 8. In the formula v = f $\lambda$, the letter $\lambda$ represents ..... A) Wave velocity. B) Frequency. C) Wavelength. D) Displacement. Show Answer Correct Answer: C) Wavelength. 9. The periodic time of a body executing SHM is 4 sec. After how much interval from time t= 0 its displacement will be half of its amplitude? A) 1/4 sec. B) 1/2 secc. C) 1/6 sec. D) 1/3 sec. Show Answer Correct Answer: D) 1/3 sec. 10. The second harmonic on a string fixed at both ends shows ..... A) A wavelength. B) Half a wavelength. C) Two wavelengths. D) A wavelength and a half. Show Answer Correct Answer: A) A wavelength. 11. If the amplitude of an oscillating object decreases over time, this is an example of ..... A) Free oscillations. B) Damped oscillations. C) Deceleration. D) Constant velocity. Show Answer Correct Answer: B) Damped oscillations. 12. A stiff material has a: A) High spring constant. B) Low spring constant. C) Spring constant of any value. D) Spring constant which is difficult to predict. Show Answer Correct Answer: A) High spring constant. 13. The maximum distance an object in simple harmonic motion moves from equilibrium is called the ..... A) Period. B) Node. C) Amplitude. D) Refraction. Show Answer Correct Answer: C) Amplitude. 14. Wavelength is measured in ..... A) Metres. B) Hertz. C) Seconds. D) Metres per second. Show Answer Correct Answer: A) Metres. 15. Amplitude is ..... A) The position of the particles relative to the mean or equilibrium position. B) The maximum displacement of the particles from the mean or equilibrium position. C) The number of wave oscillations per second. D) The distance between two points on a wave that have the same displacement from the equilibrium. Show Answer Correct Answer: B) The maximum displacement of the particles from the mean or equilibrium position. 16. A certain pendulum with a 1.00 kg bob has a period of 3.50 s. What will happen to the period of the pendulum if the 1.00 kg bob is replaced by a bob with a mass of 2.00 kg? A) Increase. B) Decrease. C) Stays the same. D) Need more information. Show Answer Correct Answer: C) Stays the same. 17. What happens when two wave crests interfere in phase? A) The amplitude increases. B) The amplitude decreases. C) Amplitude will stay the same. D) Frequency increases. Show Answer Correct Answer: A) The amplitude increases. 18. Violet light has a wavelength of 410 nm. What is the frequency? A) 1.23 e-3 Hz. B) 7.31 e14 Hz. C) 1.37 e12 Hz. D) 3.0 e8 Hz. Show Answer Correct Answer: B) 7.31 e14 Hz. 19. In the Doppler Effect for sound, the observed frequency increases when: A) The source moves away from the observer. B) The observer moves away from the source. C) The source moves towards the observer. D) Both source and observer move in the same direction at the same speed. Show Answer Correct Answer: C) The source moves towards the observer. 20. A converging lens with focal length $f$ $2f$ A) At $f$. B) At $2f$. C) At infinity. D) At the center of the lens. Show Answer Correct Answer: B) At $2f$. 21. When we're talking about a pendulum, what does T stand for? A) Pi. B) Period. C) Length. D) Gravity. Show Answer Correct Answer: B) Period. 22. The pitch of a sound is related to the ..... A) Amplitude of the sound wave. B) Frequency of the sound wave. C) Speed of a sound wave. D) Reflection of a sound wave. Show Answer Correct Answer: B) Frequency of the sound wave. 23. What happens to the speed of light when it enters a denser medium from a less dense medium? A) It increases. B) It becomes zero. C) It remains the same. D) It decreases. Show Answer Correct Answer: D) It decreases. 24. A ray of light passes from air ( $n=1$ $n=1.5$ $30^\circ$ A) $19.5^\circ$. B) $30^\circ$. C) $45^\circ$. D) $48.6^\circ$. Show Answer Correct Answer: A) $19.5^\circ$. 25. What is the best type of spring to see compressions and rarefactions? A) Hard spring. B) Soft 'slinky' spring. C) Metal spring. D) Plastic spring. Show Answer Correct Answer: B) Soft 'slinky' spring. ← PreviousNext →Related QuizzesClass 11 Physics (Part I) Chapter 10 Oscillations And Waves Quiz 1Class 11 Physics (Part I) Chapter 10 Oscillations And Waves Quiz 2Class 11 Physics (Part I) Chapter 10 Oscillations And Waves Quiz 3Class 11 Physics (Part I) Chapter 10 Oscillations And Waves Quiz 4Class 11 Physics (Part I) Chapter 10 Oscillations And Waves Quiz 5Class 11 Physics (Part I) Chapter 10 Oscillations And Waves Quiz 6Class 11 Physics (Part I) Chapter 10 Oscillations And Waves Quiz 8Class 11 Physics (Part I) Chapter 10 Oscillations And Waves Quiz 9Class 11 Physics (Part I) Chapter 10 Oscillations And Waves Quiz 10Class 11 Physics (Part I) Chapter 10 Oscillations And Waves Quiz 11 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books