Radio Waves & Electromagnetic Fields PhET lab

15 The waveform display on the oscilloscope is shown in the figure: the scales of oscilloscope are (4 ms/div in horizontal which represent the time and 4 V/div in vertical which represents the Volt). Referring to the figure The Frequency of the wave is: t of volt uestion Ti -3 -2 -1 2 time Select one: a. 60 Hz b. 250 Hz C. 50 Hz d. 125 Hz ype here to search CD 近

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-) Below are two voltage patterns measured from an oscilloscope. The voltage stage of the CHI probe is 5 V / div, the CH2 probe voltage stage is 10 V / div and the time axis is 2ms / div. According to this information, a) What are the peak to peak and rms voltage values ​​of the voltages in CHI and CH2? b) What is the frequency of the voltages in Hz? c) How many degrees is the phase difference between the two voltages, which voltage is leading?

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b) Explain the principle of wave energy? Mention any four advantages of wave energy.

A new band sensation is playing a concert and recording it for a live album to be released this summer. Select all the statements that are true for when the microphone records the sound. The microphone changes the wave from mechanical wave to an electromagnetic wave. The recorded waves are electromagnetic waves. The microphone does not change the wave type. The recorded waves are mechanical waves. The frequency or amplitude of the waves will not change in the microphone. The frequency or amplitude of the waves will change in the microphone. ✓ The microphone changes the wave from an electromagnetic wave to a mechanical wave. >

Mechanical waves are classified according to their shape. their size. how they move. their source.

What can be the observations regarding frequency in this waveform? What is the frequency in this waveform? Explain how.

The direction of the oscillation of an electric field is called..................

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2. A time-harmonic electromagnetic wave has its electric field 900 out of phase with its magnetic field. What is the time-average power carried by this wave? Explain your answer.

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a) frid Dans for This periodie wave form Vo(k) b) find the porer burned in the load Re <) 2k=Rm c) Change the value of R to maximize P

A voltage sine wave just passes thru the voltage axis at t = 0 at a value of – 30 volts and increasing negatively. It has a  positive peak value of 100 volts and frequency of 1.273239545 Hz.                                                        a.At what time (milliseconds) will the wave crosses the t-axis for the 3rd time?                                                      b. At what time will the value of voltage be 35 volts for the second time?   c. What is the value of the voltage at 287 milliseconds?

1. What is the fifth harmonic of a 500 Hz triangular wave ?

If two sinusoidal waves appeared on the screen, where the scale of ch1 is 2v/Div., and the scale of the ch2 is 5v/Div. and the time base = 1 msec/Div. Detemine the following a The peak to peak value of the first signal V, b The peak to peak value of the first signal V2 c. The frequency for each wave d The phase shift between the two waves. V1 V2

6. Referring to Figure 5, given that the peak current Ip = 5 mA. %3D i. Briefly explain the terms: angular velocity, frequency, and period. ii. Write the mathematical expression for the sine wave below that represent the ac current. iii. Find the effective value, Ims iv. Calculate the frequency, f and the period, T V. Determine the instantaneous current at t1 25 µs, t2 = 60 µs, t3 = 120 µs %3D %3D i(t) 150 350 t (us) 50 250 Figure 5

Solve the questions and show solutions.Note: The answer is given on the bottom side of the image, just show the solution on how to get it.Thanks!!!

In a sine wave:a. At what angle, or angles, is the amplitude increasing at its fastest rate?b. At what angle, or angles, is the amplitude momentarily constant?

What is the term for the time taken for one complete oscillation of the sinusodial wave of an electric signal? a) Period b) Wavelenght c) Frequency d) Amplitude

Terms: amplitude (A), phase angle (p), frequency (f), angular frequency (w), period (T), peak value (Vp), peak-to-peak value (Vpp). Draw a 60 Hz, 5 Vp sine wave on a coordinate axis and graphically identify as many of the terms as possible from the previous section. Use voltage in volts for the y-axis, and time in milliseconds for the x-axis. You can use the blank OSC templates shown in the procedure section to draw the signals. Expert Solution Vp 5 Volls f = 60H₂ Time period (T) = '/f angular frequency (W) = 2πTf =2 TT (60) = ㅗ seconds 60 Amplitude (A) = 5 volts, Vp = 5 = vp milli seconds below plot) peak to Peak Value (UPP) = 2 Vp=2 (5) = 10, volts Phase we can't find. E didn't mention about horizontal axis shifting] T 377 rad/see. Upp PA TA 25/3 50% 5 volts, (from 25 100 t (ms)

Inductance is often described as . (circle all that apply) The ability of a component to oppose a change in current The relationship between magnetism and current The ability of a component to store energy in an electromagnetic field The ability of a component to oppose a change in voltage

4.4 A mechanical sine wave causes a displacement f 2.91m after 1.15 seconds . the. Wave has an amplitude of 3m 4.4.1 Draw the wave on the graphing paper below.

Short Problem: From a sinusoidal waveform derived from an oscilloscope, determine the form factor in decimal given the following data (hypothetically): Oscilloscope Setting: Time per division: 2.255 sec/div Volts per division: 4.764 V/div Probe Setting: x1 Waveform Reading: Vertical no. of divisions (Peak Value): 5.7 division Horizontal no. of divisions (one cycle): 6.4 division Note: Follow this reminder carefully. Compute to the nearest 2 decimal places (no scientific notations) Do not round off in the middle of calculation. Use stored values. Write the numerical values only. No units in your final answer. Spaces are not allowed. Excessive number of decimals as compared to the required number of decimals may result to an incorrect answer. Use Veff=(1/sq. root of 2)Vm