Question

please the answer it doesn't really matter, I really need a good explanation of how to clearly understand this please show your working if you can

also please with a readable handwriting

23. WAVES a. Explain the difference between transverse and longitudinal waves. f(t)-A sin(wt + φ) Consider the following sine wave: b. Explain the name and function of A, a, and ф. Give units of measure, if relevant. c. What is the value of w for a 50Hz sinusoidal signal? (3 decimal places) d. Two 50Hz sinusoidal signals are being observed. One lags the other by milliseconds. What is the value of ф that applies in this situation? e. You have a signal that is composed of a 100mV 1kHz sine wave modulated by a 12V, 10Hz sine wave. Assuming that φ įs irrelevant in this question and that the voltage quoted is peak-to-peak. Sketch and label the approximate form of this signal. f. A communication system you are working on requires a square wave with a peak- to-peak amplitude of 5V, a duty cycle of 75% and a frequency of 2kHz. Sketch and label the wave form with all of the above information. g. You decide to send an optical signal using an LED driven directly by a 5V peak to-peak 14kHz sine wave. You choose a white light LED with the specifications below. Sketch the output signal from the LED when driven by the sine wave and comment on key features. What is the RMS of the applied voltage? 5 mm Round White LED specifications Symbol Condition Min Max Units Parameter Forward voltage VF I 20 mA 3.0 3.6V Zener Reverse Voltage Vz z 5mA 5.2 502A Reverse Current 100 Power dissipation MA

Answer 1

(a).

1. There are two type of waves, a). mechanical wave

b). non mechanical wave

mechanical wave requires medium to travel from one point to another point whereas non mechanical wave does not require any medium to travel from one point to another point.

on the basis of oscillation of molecules of medium when a non mechanical wave Travels.

if molecule oscillates perpendicular to the propagation of wave then it is called transverse wave.

if molecule oscillates parallel to the propagation of wave then it is called longitudinal wave.

some examples are:-

sound wave is longitudinal wave and light is transverse wave.

as electric and magnetic field oscillates perpendicular to the direction of propagation of electromagnetic wave.

whane it is measured in oY Hz → 다 Phase Censt

thon Phage Constant