This quiz works best with JavaScript enabled. Home > Class 11 > Class 11 Physics (Part I) Chapter 10 Oscillations And Waves – Quiz 4 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Physics (Part I) Chapter 10 Oscillations And Waves Quiz 4 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. A pendulum is 0.75 meters long and has a period of 4.17 seconds. The Pendulum is on an unknown planet. What is the gravity of the Unknown Planet? A) 9.8. B) 3.4. C) 1.7. D) Greater than 9.8. Show Answer Correct Answer: C) 1.7. 2. The maximum speed of a particle executing S.H.M. is 1m/s and its maximum acceleration is 1.57m/sec$^{2.}$ The time period of the particle will be: A) 1.57 sec. B) 2 sec. C) 4 sec. D) 3.14 sec. Show Answer Correct Answer: C) 4 sec. 3. What is the phase difference between a node and the successive (the next) antinode A) 45 degrees. B) 90 degrees. C) 180 degrees. D) 0 degrees. Show Answer Correct Answer: B) 90 degrees. 4. Fill in the blank:The speed of sound in air at room temperature is approximately ..... A) $150$. B) $340$. C) $1000$. D) $3000$. Show Answer Correct Answer: B) $340$. 5. If 10 waves pass an observer every second, what is the frequency of the wave? A) 10 Hz. B) 0.1 Hz. C) 100 Hz. D) 1 Hz. Show Answer Correct Answer: A) 10 Hz. 6. Frequency measures: A) The number of vibrations per hour. B) The number of vibrations per minute. C) The number of vibrations per second. D) The number of vibrations per millisecond. Show Answer Correct Answer: C) The number of vibrations per second. 7. A pendulum is 0.75 meters long and has a period of 4.17 seconds. The Pendulum is on an unknown planet. What is the acceleration due to gravity at the surface of the Unknown Planet? A) 9.8. B) 3.4. C) 1.7. D) Greater than 9.8. Show Answer Correct Answer: C) 1.7. 8. What is meant by forced oscillation? A) When an object is vibrating at its natural frequency. B) When an object continues to vibrate after the disturbance is removed. C) When an object vibrates in a resistive medium under the action of external force which acts independently of the restoring force. D) When an object receives a vibration from external sources and comes to rest after some interval of time. Show Answer Correct Answer: C) When an object vibrates in a resistive medium under the action of external force which acts independently of the restoring force. 9. Grandfather clocks are designed, so they can be adjusted by moving the weight at the bottom of thependulum up or down. Suppose you have a grandfather clock at home that runs slow. Which of thefollowing adjustments of the weight would make it more accurate? A) Raise the weight. B) Lower the weight. C) Add more mass to the weight. D) Remove some mass from the weight. Show Answer Correct Answer: A) Raise the weight. 10. If the length of a simple pendulum is quadrupled, its period will: A) Double. B) Halve. C) Increase by a factor of four. D) Remain the same. Show Answer Correct Answer: A) Double. 11. ..... deals with how much time an object oscillates, while ..... is how often it oscillates. A) Frequency; period. B) Period; frequency. C) Wave; cycle. D) Period; cycle. Show Answer Correct Answer: B) Period; frequency. 12. The combined result of adding the amplitudes of overlapping waves A) Vector. B) Addition. C) Resultant wave. D) Standing wave. Show Answer Correct Answer: C) Resultant wave. 13. Changing which of the following variables will change how fast the wave travels? A) Changing the frequency of the wave. B) Changing the period of the wave. C) Changing the medium the wave travels through. D) Changing the wavelength of the wave. Show Answer Correct Answer: C) Changing the medium the wave travels through. 14. The end point of a spring vibrates with a period of 2 s when a mass m is attached toit. When this mass is increased by 2 kg, the period is found to be 3 s. What is thevalue of? A) 1.6 g. B) 1.6 kg. C) 16 kg. D) 0.16 g. Show Answer Correct Answer: B) 1.6 kg. 15. What determines the amplitude of a wave? A) Amount of energy. B) Speed of wave. C) Wavelength. D) Frequency. Show Answer Correct Answer: A) Amount of energy. 16. What is the unit for the period of a pendulum? A) Second. B) Meter. C) M/s/s. D) Newton. Show Answer Correct Answer: A) Second. 17. Calculate the fundamental frequency of an open organ pipe of length 0.7 m. What will be the fundamental frequency if one end of the pipe is closed. The velocity of sound in air = 340 m/s. A) 521.4. B) 121.4. C) 321.4. D) 721.4. Show Answer Correct Answer: B) 121.4. 18. The interference that occurs when two waves combine to make a wave with a smaller amplitude. A) Constructive interference. B) Criticism. C) Destructive interference. D) Interjection. Show Answer Correct Answer: C) Destructive interference. 19. A 20 N weight is hung from the bottom of a vertical spring, causing it to stretch 20 cm.a. What is the spring constant?b. Calculate the period of the oscillation if the 20N weight is replaced by anotherweight of 5N, assuming that the spring is stretched and released from rest. A) $100 0.45$. B) 100 0.45 Mathematical EquivalenceON. C) All the above. D) None of the above. Show Answer Correct Answer: A) $100 0.45$. 20. Which of these does not affect the period of a pendulum? A) Length. B) Gravity. C) Mass. D) None of the above. Show Answer Correct Answer: C) Mass. 21. Amplitude is measured in ..... A) Metres. B) Hertz. C) Seconds. D) Metres per second. Show Answer Correct Answer: A) Metres. 22. A wave travelling along a string is described by, y(x, t) = 0.002 sin (40.0 x-2.0 t), in which the numerical constants are in SI units .The amplitude, (b) the wavelength, and (c) the period and frequency of the wave are respectively: A) 0.007, 0.957, 8.14, 9.318. B) 0.004, 0.657, 5.14, 0.518. C) 0.002, 0.157, 3.14, 0.318. D) 0.009, 0.557, 9.14, 0.818. Show Answer Correct Answer: C) 0.002, 0.157, 3.14, 0.318. 23. The bob vibrates up and down on a vertical spring. If the period of the motion is 2 seconds, the frequency ..... A) Also 2 seconds. B) Two cycles per second. C) One cycle per second. D) One half cycle per second. Show Answer Correct Answer: D) One half cycle per second. 24. A wave in which the oscillations are at right angles to the direction of wave travel is called a A) Compression wave. B) Longitudinal wave. C) Oscillating wave. D) Transverse wave. Show Answer Correct Answer: D) Transverse wave. 25. If the length of a simple pendulum is doubled, its period will: A) Halve. B) Increase by a factor of sqrt(2). C) Decrease by a factor of sqrt(2). D) Double. Show Answer Correct Answer: B) Increase by a factor of sqrt(2). ← 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 5Class 11 Physics (Part I) Chapter 10 Oscillations And Waves Quiz 6Class 11 Physics (Part I) Chapter 10 Oscillations And Waves Quiz 7Class 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