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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.
A load Z draws 12 kVA at a power factor of 0.856 lagging from a 120-V rms sinusoidal source. Calculate (a) the average and reactive powers delivered to the load, (b) the peak current, and (c) the load impedance.
Air is to be compressed from atmospheric pressure at 60oF to 100 psia in a centrfugal compressor (isentropic efficiency about 0.7). The flow rate will be 500 lbm/min. Specify the horsepower required for the driving motor
An engineering firm consisting of 3 programmers and 6 circuit engineers. The employees are randomly assign to 3 teams of 3, labeled Group 1, Group 2, and Group 3. a) How many ways are there to assign the 9 employees to Groups 1, 2 & 3
a. Describe the operation of a typical NMOSFET transistor used both as an amplifier and a switch. b. List the 3 regions of operation and draw the I-V characteristic curve. c. Show the effect of channel length modulation on your graph.
Write an instruction sequence to set bits 3, 2, 1, and 0 of memory location at $1000 to 1 and leave the upper four bits of the same locations unchanged. use hcs12/9s12 to program.
a voltage is given by v(t)=10sin(1000(pi)(t) + 30 degrees)V 1. use a cosine function to express v(t) in terms of t and the constant pi. find the frequency in hertz to two significant figures and appropriate units.
Determine the decimal value of each of the following SIGNED binary number displayed in the 2's complement form: a. 10011001 b. 01110100 c. 10111111
A voltage source Vs = 10 V is in series with a resistor of 10 kOhm. If the source transformation theorem is applied, what will the value of the current source be in mA
1 batman = 3 kilograms 1 hogshead = 63 gallons A basketball has a mass of approximately 624 grams and a volume of 0.25 cubic feet. Determine the density of the basketball in units of arroba per peck.
A radio receiver for the HF band covers the frequency range 2 MHz to 30 MHz. The first IF frequency is 3.0 MHz and the local oscillator is above the received signal frequency.
And how long it will take to reach that temperature assuming no heat lost in the process and comments on your results and may research the properties of nichrom wire to determine the resistivity of the wire
A 2 farad capacitor is charged up to 400v by a dc power supply. How long in seconds would it take to discharge the capacitor to a safe stored energy level of 1 joule using a 1k ohm high wattage resistor bank.
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