- Submitted By: arrudachristina
- Date Submitted: 02/06/2016 2:24 PM
- Category: Science
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- Page: 4

Carleton University

Laboratory Report

Course #: PHYS1008 Experiment #: 2

Experiment Title

Christina Arruda

101001656

Date Performed: January 25th, 2016

Date Submitted: February 1, 2016

Lab Period: L7 - Monday AM

Partner: Amanda Van Geel

Station #: 16

TA: Ming

Purpose

The purpose of the lab is to use a oscilloscope to measure simple signal waveforms and understand the controls of the machine itself.

Theory

In part 3, the quality factor of the DC circuit at a given frequency can be calculated as followed:

Eq.1

Such that is the DC voltage and is the voltage from the highest to smallest peak of the wave.

The error of the quality factor can be calculated as followed:

Eq.2

Such that is the error of the ripple and is the error of the DC voltage.

Efficiency (𝜂) can be calculated as followed:

Eq. 3

Such that represents the function generator resistance (50Ω) and is the load resistance.

Apparatus

The main machine used is an oscilloscope which measures the voltage/potential difference as a function of time. It will used to calculate the frequency from a generator in part 1 and 2. In part 2, a DMM will be used to simultaneously as an external voltmeter.

In part 3, the oscilloscope will calculate the voltage conducted by a diode in circuit in order to convert AC to DC.

Figure 1: AC/DC Conversion Circuit for Part 3

Observations

For part 1, a frequency calibration was done with the oscilloscope and frequency generator. The frequencies ranged from 0 to 106 Hz. The frequency of the generator and oscilloscope was tabulated and plotted on the graph labelled “Figure 2: The Frequency Relationship between the Oscilloscope and Generator”.

For part 2, six various output levels were set on the generator and was measured by the DMM and oscilloscope. The measurements were then compare...