An oscilloscope is a measurement device that is used to measure electrical poten

Question

An oscilloscope is a measurement device that is used to measure electrical potentials that change in time. The waveform shown in Figure 1 was taken using an oscilloscope. The waveform shows the changing electrical potential (y-axis plotted against time (x-axis). The scale of each axis is printed at the bottom. "CH1 500mv" (at the bottom left) indicates that each of the vertical divisions (dotted grid lines) represents 500mV. "M 100us" indicates that each of the horizontal divisions represents 100us M Pos: 0,000s SAVE REC Tek T rig d Action Save All PRINT Button Saves Image To File Select Folder About Save All CH1 500m M 100US CH1 20,0mW 14-Jul-15 09:36 4,10857kHz Figure 1: An oscilloscope trace.

Explanation / Answer

1. V pk - pk = 16*500mV = 8V
2. Uncertianity = 2*least count = 2*500mV = 1V [ 1 least count in the top, 1 in the bottom]
3. Period of osscilation = 12*100 micro S = 1.2 ms
4. uncertianity in time = 2*100 micro s = 0.2 ms [method same as 2nd]
5. Frequency = 1/T = 833.33 Hz
uncertianity in frequency = 119.014 Hz

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