40 TOP ALTERNATING CURRENT vs DIRECT CURRENT Online Test – Questions and Answers 1. Which control should be moved to display more cycles of a signal on an oscilloscope? time/cm to a higher setting vertical position to top or bottom volts/cm to a smaller number horizontal position to left or right 2. Signal comparisons may be most easily seen when using which item of test equipment? multimeter dual trace oscilloscope spectrum analyzer function generator 3. If a voltmeter measures a sine wave as 500 mV, what would be its average value? 159.0 mV 451.0 mV 318.5 mV 353.5 mV 4. What is the peak-to peak voltage of a 56 Vrms ac voltage? 79 V 82 V 164 V 158 V 5. How long would it take to transmit an electromagnetic wave to a receiving antenna 1,000 miles away? 5.38 ms 53.8 ms 10.8 ms 108 ms 6. One adjustable knob on the oscilloscope that allows the trace to be aligned with a reference graticule is called the: focus control intensity control position control volts/cm control 7. A sine wave has: one period two alternations four quadrants all 8. A rectangular wave that has a duty cycle of 50 percent could be called a: c wave square wave sawtooth wave triangle wave 9. One oscilloscope selector knob that allows the major and minor divisions of the graticule to be used to determine a waveform period is called a: volts/cm control focus control time/cm control intensity control 10. What is the rms voltage value of an ac signal whose peak oscilloscope display uses 3 major divisions above the zero setting? (V/cm = 5) 21.2 V 15.0 V 5.3 V 10.6 V Loading … Question 1 of 10
