Exam 3 Practice Exam Questions 2024 Graded A+

The strings in musical instruments that have greater mass tend to produce notes of? A) higher frequency B) lower frequency C) the same frequency D) none of the above {Ans: lower frequency}Some of a wave's energy dissipates as heat. In time, this will reduce the wave's? A) amplitude B) frequency C) speed D) wavelength {Ans: amplitude}Voltage is induced in a wire coil connected to a voltmeter when a magnet is moved to and fro in the coil. If the coil has twice as many loops, the voltage induced is? A) twice B) the same C) half D four times as much {Ans: twice}Sound travels fastest in? A) water B) a vacuum C) air D) steel {Ans: steel}If you played music under water the wavelength of middle C would be? A) lengthened B) shortened C) unaffected D) none of the above {Ans: shortened}When you double the voltage in a simple electric circuit, you double? A) the current B) the resistance C) both D) neither {Ans: the current}Compared with power input, the power output of an ideal transformer is? A) greater B) less C) the same D) any of these {Ans: the same}Which of these