Cro

CRO Cathode Ray Oscilloscope Learning Objectives:1. learn how to measure time-varying electronic signals with a cathode ray oscilloscope (CRO). 2.estimate the uncertainty in measure- ments made with a CRO and estimate the uncertainty in a quantities that are calculated from quantities that are uncertain. A.Introduction The cathode ray oscilloscope, CRO or simply scope, is used in many fields of basic and applied research and in electronics development and repair. It is generally thetool of choice for examining signals that change with time on a scale of 1 second to 1 nanosecond. The sketch of the scope in Figure 1 includes a triangular wave signal, a voltage that, as a function of time, continu- ally (and linearly) ramps up and down between two limiting voltages. The operation of the CRO is described in detail in Appendix IX. You should read that appendix before attempting this lab. In this lab, you will learn how to use the CRO to investigate various types of time- dependant phenomena that you will encoun- ter in your studies of electricity and magnet- ism. You should also become more comfort- able with certain aspects of sine waves, such as phase differences and the relation of fre- quency to period, that are critical to under- standing interference effects and electro- magnetic radiation. This experiment requires that you complete the worksheet worth 30 points that can be found in Appendix XI. Attach the worksheet and graphs from Lab #3A to the paper from Lab #3B and use one cover sheet for both.