Quiz on Waves Test 9 ( physics ) Welcome to your Quiz on Waves Test 9 ( physics ) Name Email 1.The SI unit for frequency is ______. (a) ohm (b) hertz (c) volt (d) joule None 2.The ‘to and fro’ or ‘back and forth’ motion of an object is termed as: (a) convulsion (b) impulse (c) swing (d) vibration None 3. A simple pendulum consists of a small metallic ball or a piece of stone suspended from a rigid stand by a thread. The metallic ball is called the ______ of the pendulum. (a) bob (b) knob (c) hinge (d) head None 4.What is the rate at which a wave moves through the water, and is measured in knots? (a) Wave height (b) Wave crest and trough (c) Wave frequency (d) Wave speed None 5.For a wave, wavelength divided by the time period is equal to (a) amplitude (b) phase difference (c) frequency (d) wave velocity None 6. ______ are also known as heat waves. (a) X-rays (b) Light waves (c) Infrared waves (d) Gamma rays None 7. _____ waves include visible light waves, X-rays,gamma rays, radio waves, microwaves, ultraviolet and infrared waves. (a) Mechanical (b) Magnetic (c) Electromagnetic (d) Electric None 8.What is the unit of loudness ? (a) Bel (b) Phon (c) Decibel (d) All of the above None 9.Which of the following is NOT a characteristic of sound waves ? (a) Velocity (b) Nature (c) Wavelength (d) Amplitude None 10.The waves used in radar systems are _______ waves. (a) ultraviolet (b) infrared (c) micro (d) radio None Time's up
