# 1. explain why a dmm must be connected in parallel with a resistor in order to measure the voltage across

###### Question:

1. explain why a dmm must be connected in parallel with a resistor in order to measure the voltage across it while a dmm must be connected in series with a resistor in order to measure the current through it.2. with your dmm set as an ohmmeter, explain why you can’t measure the value of a resistor when it is already connected in a circuit.3. with respect to sinusoidal signals, explain the difference between the way we normally define "amplitude" and the "amplitude" setting on the virtualbench function generator and the "amplitude" measurement on the virtualbench oscilloscope.4. the waveform on an oscilloscope is measured by converting an analog signal into digital levels by an analog-to-digital converter (adc). since only finite numbers of levels are available to represent the signal, there is a quantization error of at least 1 least significant bit (lsb) which is the minimum detectable voltage change - also known as resolution. discuss how the measurement accuracy could be affected by the resolution of an oscilloscope. also discuss briefly how you would choose a proper vertical scale for a waveform of known amplitude v to get most accurate measurements.5. based on your observations in experiment 6, derive an expression for an appropriate oscilloscope time scale (horizontal scale) for a waveform of frequency ‘f ‘, so that only two complete waveforms are seen on the oscilloscope screen. hint: time period (t) of a waveform is the time required to complete one cycle and is the inverse of frequency (f).

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