It is well worth paying the modest extra cost to have this facility. Longman physics homework for edexcel igcse pages 9 and 10. Power up the oscilloscope by pushing the power button. Students use the graphs to complete traces for loud, quiet, high and low sounds. The oscilloscope is a tool commonly used by engineers and technicians to analyze and. This allows you to measure properties of the wave, such as amplitude or frequency. Where the beam hits the screen, the coating on the screen absorbs the energy from the electrons and releases the energy as light a dot appears on the screen.
Electricity cathode ray oscilloscope alevel physics tutor. This tutorial will guide you through the basics of using an oscilloscope, it is meant for someone with very little or no experience with electronics or oscilloscopes. There are many types of oscilloscopes out there, and each is a little different. The characteristics of sound waves decide the pitch and loudness of the sound. Most scopes produce a twodimensional graph with time on the xaxis and voltage on the yaxis.
An oscilloscope scope for short can be used to see an electrical signal by displaying a replica of a voltage signal as a function of time. Apr 06, 2012 hello everyone, im trying to acquire a used oscilloscope that i can setup on my workbench at home. Free oscilloscopes books download ebooks online textbooks. You may want to get lessons from a ham radio geek or local hackerspacerobotics clubphysics teacher. An oscilloscope is a machine that shows the wave shape of an electrical signal. Swift 16671745 objective to learn to operate a cathode ray oscilloscope.
Gcse, additional gcse, igcse and international cieedexcel o level. Edexcel international gcse 2009 in physics 4ph0 and edexcel level1level 2 certificate in physics kph0 the number of guided learning hours required for this qualification is 120140, which equates to approximately 2 hours per week over 60 weeks and reflects how centres will use time for practical activities differently. Ppt aqa gcse science powerpoint presentation free to. Additional science ph2fp f gcse and alevel revision.
Measure waves using oscilloscopes to see analogue and digital signals. A basic lesson on how to use an oscilloscope as a voltmeter and to display a waveform for period, frequency and peak measurements. The trigger is an important asset of the oscilloscope. Meaning, that unless the scope could store the trace, a single shot would not be seen by. Theory the oscilloscope, or scope for short, is a device for drawing calibrated graphs of voltage vs time very quickly and conveniently. Where the wave goes below the zero line the current flows. Xyzs of oscilloscopes pdf 64p this book provides a solid understanding of oscilloscope basics. You may want to look at the lab assignment book for horowitz and hill. Aqa gcse physics third edition book where to get answers.
May 26, 20 you may want to look at the lab assignment book for horowitz and hill. Hello everyone, im trying to acquire a used oscilloscope that i can setup on my workbench at home. Oscilloscope, trace, voltsperdivision, alternating current, ac, direct current, dc. J k l 0 v 2 v 0 v0 v in each diagram, one vertical division on the oscilloscope screen represents 2 volts. The oscilloscope is a very widely used laboratory instrument frequently used to give a visual display of timevarying voltages. The picture above shows two complete cycles of the wave displayed on the cro. Some of the material is first year degree standard and is quite involved for both for maths and physics. Oscilloscope worked example gcse and a level physics. The initial signal above is a 200hz sine wave, which has an amplitude of 5 volts.
The diagrams show graphical representations of sound waves as seen on an oscilloscope screen. These diagrams show oscilloscope traces of three sounds. The two controls on an oscilloscope we are interested in are. Equivalent time sampling method of sampling used on a dso, wherein sampling is synchronized with the trigger signal, usually one sample per cycle of the input. The display is generated by a sweeping electron beam striking a fluorescent screen, the same principle behind common television displays. You may want to get lessons from a ham radio geek or local hackerspacerobotics club physics teacher. Jan 30, 2017 an oscilloscope is a technicians best friend. Dear learners attached are revision notes, questions and answers on the sections radioactivity and cathode ray oscilloscope. Introduction to oscilloscopes lab experiment laboratory experiment introduction objectives 1.
Purpose understand, read, and use the controls and features of an oscilloscope. The oscilloscope vision is the art of seeing things invisible. Where the wave goes above the zero line, the current flows forwards. This book has been prepared for all users of oscil. The following steps will describe how to automatically create a stable oscilloscope display using a 1 khz, 5 v pkpk square wave. Oscilloscopes and sound sound gcse physics single science. Figure 1 is a simplified diagram of a cathode ray oscilloscope. Experiment 24 the oscilloscope department of physics and. If a microphone is connected to an oscilloscope, the sound received by the microphone is transferred electrically and the oscilloscope trace can be used to compare frequency pitch and amplitude loudness. Isaac physics a project designed to offer support and activities in physics problem solving to teachers and students from gcse y11, through to university. Understand the block diagram and basic controls of a digital oscilloscope. I want one that will work well for an ee student, only cost around a couple hundred bucks, and be sufficient for the first couple of years as an engineer. Isaac physics a project designed to offer support and activities in physics problem solving to teachers and students from gcse. An oscilloscope is an device that displays electrical waveform signals on a graph over time.
Feb 22, 2011 a basic lesson on how to use an oscilloscope as a voltmeter and to display a waveform for period, frequency and peak measurements. Lab 2 the oscilloscope stony brook physics laboratory manuals. Input connected to ground zero volts and timebase switched off, oscilloscope trace is a spot in the middle of the screen. For the love of physics walter lewin may 16, 2011 duration. As others have pointed out, it tells you voltage vs time. Distinguish between alternating and direct current, state the frequency and potential difference of uk mains electricity, describe how the potential of the live wires varies with each cycle, use oscilloscope traces to compare direct and alternating potential differences and measure the peak voltage of an ac source, measure the period and. Edexcel international gcse 2009 physics 4ph0 and khp0.
By setting the oscilloscope in parallel with various components in a circuit, voltage across the component can be accurately read and. The cathode ray oscilloscope this versatile instrument was developed by brown in 1897 from the cathode ray tube. Sound can be reflected, refracted and diffracted which shows that it travels as a wave. Theory the oscilloscope is used as a tool for testing electrical components and circuits. It seems to be mostly an analysis of a bunch of scopes and other test equipment that were for sale some years or decades ago.
In this example i show you how to read the trace from an oscilloscope to determine the amplitude and frequency of a signal. Such an instrument is obviously useful for the design and. They place a strong emphasis on how science works and engage students with uptodate applications and ideas. Make common electronic measurements with a digital oscilloscope. If you want to know everything about what is going on in a circuit the scope is a great tool.
Good oscilloscope for an ee student physics forums. The cathode ray oscilloscope schoolphysics welcome. A quick video looking at how to read oscilloscopes and among other things how to find frequency from the oscilloscope trace. This book is not complete in any sense of the word. Explain the difference between a progressive wave and stationary wave in phase, amp. The oscilloscope is arguably one of the most useful general purpose tools ever created for use by electronic engineers. The purpose of this lab is to introduce students to the basic tools used by engineers and technicians in analyzing electronic equipment. If you have any improvements or comments please let me know so i can adjust them. While that is the standard application, a second voltage can be applied to the horizontal deflection plates instead of the timing ramp voltage to produce an xy plot. A signal the yellow sine wave in this case is graphed on a horizontal time axis and a vertical voltage axis.
Kind regards mr ronesh radioactivity and crt ans radioactivity and crt revision radioactivity and crt notes radioactivity notes. Dual trace an oscilloscope having two traces to display channel 1 and channel 2 signals simultaneously. Long a standard tool in the electronics shop, the versatile oscilloscope uses an electron beam to trace the voltage as a function of time. The last part of the lesson will require pupils to observe oscilloscope traces for different a. The first figure or page number always refers to the gcse physics book. Oscilloscopes the two controls on an oscilloscope we are interested in are. Students will then need to complete a fillintheblank task to sum up the main points about the national grid. An oscilloscope is a useful tool for anyone working with electrical signals because it provides a visual representation of the signals shape, or waveform. Stewart chenery and steve witney are senior examiners for a major awarding body. As the distance between the microphone and the speaker is increased, the phase of the signals varies and the traces on the screen move past each other. Gcse physics what does alternating current look like on a. An oscilloscope should be handled gently to protect its fragile and expensive vacuum tube. Edexcel igcse physics student book pages 1218, 2325, 21, 33 and 57. By reading oscilloscope traces and doing calculations, you can calculate the frequency using the equation where f is frequency hz and t is time s.
It has many uses, including voltage measurement, observation of wave forms, frequency comparison and time measurement. Setup an oscilloscope for a stable display of the applied signal. Simple treatment of the cathode ray oscilloscope in a cathode ray oscilloscope, cro, the electron beam is directed towards a fluorescent screen. On page 77 of the aqa as physics book it says that figure 2 shows an oscilloscope with a waveform height of 5cmi count it more as 2. In a tv, electron beams are made to scan back and forth across a screen coated on the back with special chemicals called phosphors.
A mans voice tends to have a lower pitch than a womans voice. When connected to a microphone they can show the wave shapes of sounds. While that is the standard application, a second voltage can be applied to the horizontal deflection plates. Jul 16, 20 a quick video looking at how to read oscilloscopes and among other things how to find frequency from the oscilloscope trace. These are some notes and pictures ive put together and collected on using an oscilloscope for as level physics. If a microphone is connected to an oscilloscope, the sound received by the microphone is transferred electrically and the oscilloscope. A traditional oscilloscope works in almost exactly the same way as a traditional cathoderay tube television. A helpful revision guide on energy transferred and oscilloscopes, such as the frequency period, for gcse physics. On a double beam oscilloscope the phase difference in cm is be measured along the timeline between similar points on each wave.
Ygain in voltsdivision, 1 vdiv time base in timedivision, e. The oscilloscope will display on two traces the signal fed to the loudspeaker and the signal received by the microphone. The main purpose of an oscilloscope is to graph an electrical signal as it varies over time. Radioactivity and cro revision igcse physics year 2. All our resources for aqa gcse science focus on reallife contexts. First we explore what is meant by these two types of current and then we look at how to use an oscilloscope trace to determine the features of. While some oscilloscopes now use liquidcrystal displays lcds, many including the ones you will use still use a cathoderay tube crt. Introduction to the oscilloscope saddleback college. Push the frontpanel default setup button to set the oscilloscope to a known starting point. Oct 22, 2019 a traditional oscilloscope works in almost exactly the same way as a traditional cathoderay tube television.
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