Make sure that you can make readings from diagrams of oscilloscope traces 17 of 17. Additional science physics gcse and alevel revision. Determine the speed of sound in air using a 2beam oscilloscope, signal generator, speaker and microphone objective. Three examples of oscilloscope traces from generators are shown above x axis time. Cathode ray oscilloscope igcse and a level physics youtube. The diagram shows the trace produced by an alternating current a. If the current constantly changes direction it is called alternating current, or ac. A series of free gcse igcse physics notes and lessons.
This allows you to measure properties of the wave, such as amplitude or frequency. Users may need to adapt the risk assessment information to local circumstances. Why does the diode cause the trace on the oscilloscope screen to change. Oscilloscopes and sound sound gcse physics single science.
An oscilloscope is a useful tool for anyone working with electrical signals because it provides a visual representation of the signals shape, or waveform. A useful guide about alternating current and oscilloscopes, including rms values, ac and the frequency of the trace equation, for a level physics. 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. The microphone turns sound waves into an alternating electrical voltage which the scope displays on a screen. Learn vocabulary, terms, and more with flashcards, games, and other study tools. My resources contain a mix of biology, chemistry and physics lessons aimed at meeting specification points for the new aqa trilogy gcse course and ks3 activate course. Isaac physics a project designed to offer support and activities in physics problem solving to teachers and students from gcse level through to university. Course i laboratory practicals part ii department of. Each word may be used once, more than once, or not at all.
Figure 2 shows the oscilloscope trace an alternating current a. This booklet will be the equivalent of 2 set homework tasks and will be handed in on the due date. Question sheet for students to consolidate knowledge on traces working out frequency and time period. Help with gcse physics, aqa syllabus a as level and a2 level physics. Oscilloscope, trace, voltsperdivision, alternating current, ac, direct current, dc course overview.
Search the worlds most comprehensive index of fulltext books. Detecting sound sound waves ks3 physics revision bbc. Additional science ph2fp f gcse and alevel revision. The more waves there are displayed, the higher the pitch. The diagrams show some typical oscilloscope traces for sound. One way of investigating differences in sound is to use a microphone connected to an oscilloscope. Pearson edexcel international gcse 91 friday 14 june 2019. These diagrams show oscilloscope traces of three sounds. To measure the phase difference in radians, the horizontal length of one wave in cm must also be known the period. When connected to a microphone they can show the wave shapes of. The sound waves have the same frequency, so the sounds have the same pitch. Ac and dc electrical circuits, ac and dc gcse physics.
Ac and dc current examples, solutions, videos, notes. Tes global ltd is registered in england company no 02017289 with its registered office at 26 red lion square london wc1r 4hq. A differentiated resource that assesses students understanding of the relationship between wavelength, frequency, amplitude and pitch loudness. P12 homework booklet 174 187 use gcse physics book. What is meant by ac and dc current and how to use an oscilloscope trace to determine the features of an ac supply.
The diagram shows an oscilloscope trace of a sound wave. This website and its content is subject to our terms and conditions. Use an oscilloscope trace to work out features of an ac supply. Electricity cathode ray oscilloscope alevel physics tutor. Oscilloscope worked example gcse and a level physics. An oscilloscope is a machine that shows the wave shape of an electrical signal. When you have completed the booklet go to the schools. Figure 2 5 v 0 v one vertical division on the oscilloscope screen represents 5 volts. The initial signal above is a 200hz sine wave, which has an amplitude of 5 volts. Set up the oscilloscope so the detected waves at each microphone are shown as separate waves. The basic procedure for testing an electronic circuit with an oscilloscope is to attach the ground connector of the scopes test lead to a ground point in the circuit, and then touch the tip of the probe to the point in the circuit that you want to test. Cross through any work you do not want to be marked. The diagrams show oscilloscope traces for the same musical note played on two.
Input connected to ground zero volts and timebase switched on, trace appears as a horizontal line in the middle of the screen. Figure 1 figure 2 shows the trace produced by the sound wave on the cro. For the love of physics walter lewin may 16, 2011 duration. Power stations sometimes produce electricity using magnets. The first figure or page number always refers to the gcse physics book.
Learn about the meanings of electrical symbols and properties of electrical circuits with bbc bitesize gcse physics. Gcse igcse physics part1 cathode ray oscilloscope parts from cro cathode ray. You are expected to attempt all questions in the booklet. P5 homework booklet 6473 use gcse physics book pages.
Figure 2 a second note, of different wavelength, was played on the keyboard. Examiner for aqa and edexcel had a brief fling with ocr. If you fail to complete this booklet or you lose the booklet you will be expected to complete a 30minute. A quick video looking at how to read oscilloscopes and among other things how to find frequency from the oscilloscope trace. Tes global ltd is registered in england company no 02017289 with its registered office. Isaac physics a project designed to offer support and activities in physics problem solving to teachers and students from gcse. International gcse 91 friday 14 june 2019 morning time. 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. Ac and dc current describe what is meant by direct current dc and alternating current ac. It has a frequency of 50 hz, which means that it changes direction and back again 50 times a second. The diagram shows an oscilloscope screen displaying the signal from an ac supply. An oscilloscope can be used to determine the frequency of a sound wave. On a double beam oscilloscope the phase difference in cm is be measured along the timeline between similar points on each wave. Gcse additional sciencephysics question paper unit 02 physics june.
The diagrams show graphical representations of sound waves as seen on an oscilloscope screen. Oscilloscopes the two controls on an oscilloscope we are interested in are. Figure 3 shows the trace on the screen of the oscilloscope. Oscilloscope traces using an oscilloscope to investigate a changing potential difference. This booklet will be the equivalent of 2 set homework tasks and will be handed in. Announcements i set up a vr company at uni to help with public speaking, ama find your gcse study and revision group here and get ahead on your revision find your alevel study and revision group here and get ahead on your revision. The aqa gcse science textbooks are in the aqa approval process. First we explore what is meant by these two types of current and then we look at how to use an oscilloscope trace to. An oscilloscope screen displaying the signal from an alternating current ac. Input connected to ground zero volts and timebase switched off, oscilloscope trace is a spot in the middle of the screen. Using an oscilloscope to investigate a changing potential difference gcse keywords. For higher physics revise how to determine peak voltage and frequency from oscilloscope screenshots. Ac and dc electrical circuits, ac and dc gcse physics single. In this example i show you how to read the trace from an oscilloscope to determine the amplitude and frequency of a signal.
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