INTEFERENCE -is the phenomenon that occurs when two waves meet while traveling along the same medium. The interference of waves causes the medium to take on a shape that results from the net effect of the two individual waves upon the particles of the medium. To begin our exploration of wave interference‚ consider two pulses of the same amplitude traveling in different directions along the same medium. Let’s suppose that each displaced upward 1 unit at its crest and has the shape
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CHAPTER-15 Question 15.1: * Answer (b) Answer: 10 MHz For beyond-the-horizon communication‚ it is necessary for the signal waves to travel a large distance. 10 KHz signals cannot be radiated efficiently because of the antenna size. The high energy signal waves (1GHz − 1000 GHz) penetrate the ionosphere. 10 MHz frequencies get reflected easily from the ionosphere. Hence‚ signal waves of such frequencies are suitable for beyond-the-horizon communication. Question 15.2: * Answer
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Logan’s Logo So Logan has devised a logo for her company which is a square divided into 3 sections with 2 functions. Our objective is to find what functions fit the two curves on her logo and also make it fit on two other sizes of her logo. Just looking at the shape of the lines 2 types of functions immediately jump into my head‚ sinusoidal and cubic. I first traced a grid onto the original copy of the logo I was given in order to get points to start trying to form a function to match the design
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Samples | Physical State | Color | Appearance | Solubility in Water | | | | | | Group IA and Group IIA Elements | | | | Li2CO3 | Solid | White | Shiny Powder | Soluble | Na2CO3 | Solid | White | Refined Powder | Soluble | K2Co3 | Solid | White | Powder | Soluble | MgCO3 | Solid | White | Unrefined Powder | Insoluble | CaCO3 | Solid | White | Powder | Insoluble | BaCO3 | Solid | White | Crystalized Powder | Insoluble | | | | | | Some Group IVA Elements | | |
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Assignment No. 1 for Communication Engineering‚ 4th sem IT students (to be submitted in class on 26/02/2013) Q. 1 A carrier signal with a peak voltage of 50V is amplitude modulated with a 1KHz test tone. The modulation voltage has an effective value of 5V. Compute the following: a. The percent modulation m b. The instantaneous voltage of positive and negative envelope when the 1KHz sine wave has completed 810 ������s of its cycle. c. Illustrate the waveform showing voltage levels and times. Q.2 Repeat
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PART 2 : FOURIER SERIES Objective : 1. To show that any periodic function (or signal) can be represented as a series of sinusoidal (or complex exponentials) function. 2. To show and to study hot to approximate periodic functions using a finite number of sinusoidal function and run the simulation using MATLAB. Scope : In experiment 1‚ students need to learn using MATLAB by connect it with Fourier series‚ where students must know how the output changes as higher order terms are added
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Tutorial Sheet # 2 1. Sketch the time variation and frequency spectrum of an RF signal with 75 % Amplitude Modulation. Show several cycles of the modulated wave. Make the modulation frequency 1/10 of the carrier frequency. The unmodulated carrier has peak amplitude of 1.0V. In an amplitude modulation system‚ the message signal is given by Fig. and the carrier frequency is 1 KHz. The modulator output is SAM (t) = 2(b + 0.5m (t)) cos ωc t. 2. a. Determine the average message power. b. If b =
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In the most simple form‚ FM digital synthesis consists of two sine waves. One is called the modulating wave and the other is called the carrier wave. The carrier wave is the only waveform that is audible. The modulating wave does just as it sounds‚ it modulates the amplitude of the carrier wave‚ and acts as a control value. The frequency of the modulating frequency controls the rate of change in the carrier wave; it controls how fast the modulation occurs in the carrier wave. And the amplitude of
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Stock Market Model (Sine Curve) Sine curve is a technique used in everyday life. Whether it be from sound waves‚ to electrical curves‚ or light waves‚ sine curve is all around us. One place that is hugely affected by sine curve is the STOCK MARKET. The stock market is where “ publicly held companies are issued or traded through either exchanged or over-the-counter market”(investopedia.com). The purpose of using sine curve is to show whether or not the market is a cycle mode or a trend mode
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A&P II – Test 3 – Rider Urinary System: Q 1. a) What are the different parts of urinary system. The 2 kidneys‚ The 2 ureters‚ the Urinary Bladder and the Urethra. b) What is nephron? Name different parts of a nephron. Write absorption and secretion of different parts of a nephron. Nephron: It is the functional part of the kidney‚ encharged of filtration of blood and eliminates the nitrogenous waste of our bodies. The nephron consists of: functional units; two parts: renal corpuscle
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