HW#6 EC & plant based

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

Q. 14. When constructing volt time curve, if flashover occurs on the tail side of the wave, the point on the curve will have a voltage magnitude equal to: A The applied wave peak B. The applied wave flashover point C. The applied wave peak multiplied by a factor of 0.9 D. The applied wave flashover point multiplied by a factor of 0.9 itte waiml|

Which is the result of a radio wave being absorbed as it crosses materials in Ex. 2.1 - The amplitude of the wave Select one: a. is Cancelled or Null b. Decreases c. Doubles d. Increases

Light from a chromatic light source strikes a surface. 20% is reflected and 30% is absorbed.  a.) What percent of the light incedent on the surface is transmitted? b.) what are the reflectants, absorptance, and transmittance values? c.) In your opinion, is the surface receiving the light or dark in color? d.) is the surface translucent or opaque?

2. In thermal radiation, when temperature (T) increases, which of following relationship is correct? A. Light intensity (total radiation) increases as I x T. B. Light intensity (total radiation) increases as I x T4. C. The maximum emission wavelength increases as Amax x T. D. The maximum emission wavelength increases as Amax x T4.

18.a. How does dispersion affect light pulses in an optical fiber? A. It causes total internal reflection. B. It can cause pulses to be indistinguishable. C. It causes pulses to die off as they travel down a fiber. D. It causes pulses to increase in power as they travel down a fiber. 18.b. Which of the following frequency bands do single-mode optical fibers use for communication? A. L B. C C. S 18.c. What type of cable is presently used to route phone and internet service to homes? A. Patch B. Fiber optic C. Twisted copper D. Coaxial

A 2 V signal is incident to the interface from a 75 Ohm region propagating to a 50 Ohm impedance region. What is the reflection coefficient? What is value of the incident, reflected and transmitted wave? What voltage would you measure on either side of the interface right after the signal goes through the interface. For the interface, I'm a little confused. I used a voltage divider and got V_transmitted = 0.8 and V_incident = 1.2. But shouldn't they be the same?

PLEASE ONLY ASSIST WITH THE LAST TWO (2)

An active dipole in open circuit has a voltage of 120v and in short circuit it has a current of 25A. Under what current does a 750W load absorb and under what condition does it present maximum efficiency.