It is often necessary to change the physical direction of propagation or the wave's polarization in waveguides. What is the purpose of a twist section?
A. To produce shunting reactance across the guide
B. To change the plane of polarization of the wave
C. To change the physical direction of propagation
D. So low received power does no damage to the powerful transmitter output
B
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_______________ is a moral obligation of people all over the world to preserve as much of our natural earth as we can so that future generations will be able to enjoy it, as well
Fill in the blank(s) with correct word
The largest number of tree farms are located in the North
Indicate whether the statement is true or false
PROBLEM 3.71 The hollow steel shaft shown rotates at 240 rpm. Determine (a) the maximum power that can be transmitted, (b) the corresponding angle of twist of the shaft.
Which instrument measures the pressure of flue gases in the furnace?
A. draft gauge B. smoke tester C. carbon dioxide tester D. stack thermometer