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A turnstile antenna consists of two crossed dipole antennas. in this case, located in the x-y plane - the dipoles are also identical and lie on the x and y axes respectively and are both fed at the origin assume the equal currents are supplied to each antenna and that a zero phase reference is applied to the x direction antenna.
Determine relative phase of the y directed antenna so that the net radiated electric field as measured on the positive z axis makes an angle between x and y.
An intergrated circuit temperature probe is rated at 0-10 volts dc over a 0-175 degrees Celsius range. What is the temperture when the output voltage is 3.65 volts dc
The stator frequency of an induction machine is 50 Hz and the rotor circuit frequency is 5 Hz. What is the rotating speed in rpm for a 4-pole induction machine
C=1000 pF R=10 kohms a. Determine A = Vo/Vi at f = fc for the high-pass filter. b. Determine A = Vo/Vi at two octaves above fc. Is the rise in Vo significant from the f = fc level
A waveform generator has been setup with a square wave output at 4.0kHz with a 81% duty cycle. If the peak-to-peak output amplitude has been set to 6.0V, with an offset of -1.0V, what is the maximum voltage of the output waveform
The total friction and core losses may be assumed to be constant at 403 Watts, independent of load. For a slip of 2% , compute the speed, output torque, and power and stator current, power factor and efficiency when the motor is operated at rated ..
A 2N3904 has a power dissipation of 625mW without a heat sink. If the ambient temperature is 65 degree C, what happens to the power rating
A 60 Hz, 765 kV three-phase overhead transmission line has four ACSR 1113 kcmil 54/3 conductors per phase. Determine the 60 Hz resistance of this line in ohms per km per phase at 50o C.
Each of the capacitance units is built of 4 similar 100V capacitors. Determine the capacitance of each capacitor.
A certain pn junction is operating with Vt=26mV and ni=1.08x10^10 electrons/cm^3. The doping concentrations are Na=2x10^15 cm^-3 and Nd=9x10^16cm^-3. The diffusion coefficient are Dn=34cm^2/s and Dp=12cm^2/s.
A variant of the binary symmetric communication channel described in class is called a binary erasure channel. The transmitter sends a ‘0' or ‘1,' but at the receiver there are three possibilities: a ‘0' or ‘1' or ‘undecided bit..
The angle of departure is defined as 180 degrees plus the phase angle of GH computed at the complex pole, but ignoring the contribution of that particular pole.
average velocity of v meters/second. If the concentration of free electrons is 10^{29} electrons per cubic meter and if they are uniformly dispersed throughout the wire, then what is the average velocity of an electron
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