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This quiz is about reading off the information on the oscilloscope grid. Voltage is vertical, and the reading will always be in divisions and hash marks. Four hash marks divide each division into five smaller intervals, to make it easier to measure a fraction of a division. The voltage division number in the reading will be 0 through 8 -- the bottom line is zero, the top line is 8, and the hash mark will be 0 to 4.
The horizontal axis is time, and the time scale is (hopefully) properly calibrated. There are ten divisions total. Each division is divided up by five hash-marks on the central horizontal line, to make measuring the time easier. If measured from the left side, the central line would be five divisions away, and would be div 5.
One sets the voltage and time units per division on the oscilloscope. The time knob is visible in the introductory figures. The voltage isn't calibrated, though. It will always be referred to in div.
Review the grid above. The time is 3 div, and 3 hash marks to the right of the central line. The knob is set to 2 ms/div. Calculate the time from the central line, in ms. (This requires an exact answer.)
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