5.02 Exploring Waves Lab Report Assignment Handout-1
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Apr 3, 2024
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Exploring Waves Lab Handout
LAB
PROCEDURE
Go to the simulation found at PBS LearningMedia
entitled, “Waves: Amplitude, Frequency, and Wavelength” .
1.
Frequency and Wavelength
2.
Choose the “frequency” exploration and select the sound tab to conduct your exploration. 3.
Use the slider for frequency and change it and observe how the waveform changes on the screen.
4.
Note how the value of wavelength changes as you change the frequency of the sound. 5.
Take screenshots for any two waves of different values of frequency. Use the values of wavelength and frequency and explain how the inverse proportion relationship between wavelength and frequency is justified. SCREENSHOTS AND EXPLANATION:
Explanation: 1
The relationship. Between wavelength (λ) and frequency (f) in a wave is characterized by the equation c = λ * f, where c represents the speed of light. This equation emphasizes the inverse proportionality between wavelength and frequency: when one variable increases, the other must decrease to uphold a constant speed of light. Examining the data above, with a wavelength of 1 meter and a frequency of 320 Hz, we can apply the formula to calculate the speed of the wave (c). The result, 320 m/s, signifies that for a relatively long wavelength of 1 meter, the corresponding frequency is 320 Hz. Taking a look at the second screenshot, it consists of a 4.3-meter wavelength and a 80 Hz frequency which shows the inverse
proportionality of their relationship. As the wavelength increased the frequency decreased to maintain a
consistent speed of light. These situations align with the expected behavior of the inverse relationship. The observed data reaffirms the fundamental principle of the inverse proportionality between wavelength and frequency, demonstrating how adjustments in one variable compensate for changes in the other to maintain a consistent speed of light in the wave. 2.
Amplitude and Sound Energy
1.
Choose amplitude exploration and select the sound tab.
2.
Observe the sound wave on the screen and how it changes as you adjust the amplitude.
3.
Use the slider to adjust the amplitude of the sound wave and observe how it affects the energy level.
4.
Take screenshots of any two waves with different values of amplitude. Use the data of amplitude and energy to explain the relationship between amplitude and energy.
SCREENSHOTS AND EXPLANATION:
2
Explanation: Examining the data above, a clear relationship emerges between amplitude and energy in a wave. The dataset consists of two pairs: Amplitude 1 (7) with Energy 1 (49) and Amplitude 2 (1) with Energy 2 (1). The pattern observed indicates that as the amplitude decreases, so does the corresponding energy. This relationship is mathematically described by the equation E
A
2
, signifying that energy is proportional to the square of the amplitude. Applying the relationship to the data, the calculates validate the observed energy values. Specifically, the squared decrease in amplitude from 7 to 1 result in a proportional decrease in energy from 49 to 1. This relationship implies that small changes in amplitude lead to more significant changes in energy. Overall, higher amplitudes in a wave are associated with higher energy levels, and this connection follows a quadratic function. Therefore, the provided data supports the understanding that energy and amplitude are directly linked, with energy being proportional to the square of the amplitude in a wave. 3
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PART-B :QUESTIONS
3.
Given below is a waveform. Use the ruler in the fig or printout and use a ruler to determine the following characteristics. Write them with at least 2 significant digits and with correct units. Given that the entire wave train takes 25 s to pass through a point, calculate the frequency and the wave speed of the wave. Make sure you show appropriate work and/or explain how you got these values. Total no. of waves in the wave train
5
Amplitude of the wave
1.5 m
Wavelength of the wave
2 m
Frequency of the wave
0.2 Hz
Speed of the wave 0.4 m/s
4
4.
Now it is time to draw your own waves. Draw two waves in the following grid. Be sure to draw enough no. of waves of A and B that fills the grid. Wave A – amplitude of two units and wavelength 6 units. Wave B – amplitude of 4 units and wavelength of 4 units . 5
Related Questions
5. Compare the frequencies measured with the oscilloscope (Measured Menu and Cursors) to the
function generator setting. What are the main sources of error in this measurement?
An oscilloscope displays the waveform shown below. If the volts/div setting is set on 10 and the
sec/div setting is on 1.0 ms, determine the peak-to-peak voltage and the frequency.
6.
109
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Explain the operation of clamping circuit.
In clamping circuits, what is the effect of adding a battery in series with the diode?
In designing clamping circuits, what should be the values of Resistor and Capacitor?
List at least 3 applications of waveshaping circuits?
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Kp
Ko-4
K,
P(s)
E(s)
kp-2
K S
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The waveform displayed on an oscilloscope is as shown in Figure The 'time/cm' switch is set to 20 ms/cm, and the 'volts/cm' switch is set to 30 V/cm. Determine the (i) amplitude of waveform Q, (ii) peak to peak value of waveform P, (iii) frequency of waveform P and (iv) phase angle difference between P and Q in Degrees and (v) R.m.s value of waveform Q.
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The waveform displayed on an oscilloscope is as shown in Figure The 'time/cm' switch is set
to 10 ms/cm, and the 'volts/cm' switch is set to 50 V/cm. Determine the (i) amplitude of
waveform Q, (ii) peak to peak value of waveform P, (iii) frequency of waveform P and (iv)
phase angle difference between P and Q in Degrees.
Q
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Answer the ff.__________1. A wave shaping circuit which controls the shape of the output waveform by removing a portion of the applied wave.
__________2. An electronic circuitthat fixes either the positive or the negative peak excursions of a signal to a defined value by shifting its DC value.
__________3. A form of semiconductor diode in which at a critical reverse voltage a large reverse current can flow.
__________4. An electronic component composed of two conductive plates separated by an insulator.
__________5. A type of capacitor used in sensing applications as well as in RF electronics.
__________6. A type of capacitor where the cross-sectional area is changed as one set of plates are rotated with
respect to the other.
__________7. A material used as electrodes for an electrolytic capacitor aside from aluminum.
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For a half-wave rectifier that converts 60Hz AC to 12V DC voltage with no more than 1% ripple at a load current of 1A, the required capacitance of the filter capacitor should be at least ________F.
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Recommended textbooks for you
- Delmar's Standard Textbook Of ElectricityElectrical EngineeringISBN:9781337900348Author:Stephen L. HermanPublisher:Cengage Learning

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