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In most situations it is also desirable to send information from the process to be controlled--in this case the 500-gallon tank--to a central station for processind and storage. this information can
Assume that one of the pumps uses a1/4hp DC shunt motor with an input voltage of 115VDC that pulls 1.6A running at 1500 rpm. The filed resistance for the motor is 600 ohms and the armature resistanc
A wooden cylinder 30.0 cm highs gloats vertically in a tube of water (density = 1.00 g/cm cube). The top of the cylinder is 14.1 cm above the surface of the liquid. What is the density of the wood
The acceleration of a particle is defined by the relation a = -k/x . It has been experimentally determined that v = 15 ft/s when x = 0.6 ft and that v = 9 ft/s when x = 1.2 ft. determine (a) the vel
What is the change in the potential energy of the charge Q=1nC that has been moved from the point with the potential 2V to the point with the potential of 5V
The voltage between two charged parallel plates is 5 volts (the top plate has more negative potential). What energy is acquired by an electron that is moved from the bottom plate up to the top plate
Assuming that we can determine the Thevenin equivalent resistance of our wall socket, why don't toaster, microwave oven,and TV manufactorer match each appliance's Thevenin equivalent resistance to t
An amplifier operating from a single 15-V supply provides a 12-V peak-to-peak sine-wave signal to a I-ill load and draws negligible input current from the signal source. The de current drawn from th
The voltage across a 10-µF capacitor is given by v(t)=100sin(1000t). Find expression for the current, power, and stored energy. Sketch the waveforms to scale versus time.
A function generator is adjusted to give a 60 HZ sine wave with no-load (open-circuit) voltage of 3Vrms. When a 1k ohm load is place across the output terminals of the function generator, the output
A DC power supply is adjusted to give a no load output voltage of 15 volts with the AC line voltage of 115 volts rms. A full load current of 1A is drawn into the circuit and the output voltage drops
The voltage drop across a 1 cm long resistor is 10 V. a) Calculate the electric field across the resistor; b) Calculate the work done by the electric field when it pushes a single electron through the
In an FM line of sight link , the frequency is 6 GHz and the beamwidth = 27 MHz the transmitting and receiving antennas have a gain of 33 dB , the receiving antenna is 40 Km apart from the transmitt
Design a continuous antenna array to have the following soace factor : [(sin(2πcosθ))/(2πcosθ)] , at a wavelength λ=.5 m namely,find : i- the current distribution and th
Design a uniform ordinary end-fire array to have a half power bandwidth (HPBW) no greater than 100°, namely : i- find the number of elements N, take the inter-element spacing d=λ/8. ii- fin
Design an ionospheric radio link over a distance of 2500 Km given that the ionosphere effective height is 275 Km and the electron density N= 2*1011 /m3, namely find : i- the angle of incidence on the
In a line of sight link , the transmitted power = 1 watt at the frequency of 11 GHz and the transmitting antenna has gain of 1000 , the receiving antenna is 40 Km apart from the transmitting station
consider a 3λ/4 linear wire antenna which is fed at the center,find : i- the current distribution on the wire. ii- for the input current of .7 Amp, find the loop current (I0) , and the maximum
1- A one-meter long wire antenna is center fed by a source with frequency 30 MHz : i- find the wavelength and the current distribution along the antenna . ii- find the radiation resistance. iii- if th
Determine the distance from a parabolic reflector of diameter D=10 m to the boundary of the far-field region. The antenna is being used to transmit a 4.1 GHz signal.
What is the effective radiated power of a television broadcast station if the output of the transmitter is 1000 W, antenna transmission line loss is 50 W, and the antenna power gain is 3
If the power of a 500-kHz transmitter is increased from 150 W to 300 W, what would be the percentage change in field intensity at a given distance from the transmitter. What would be the decibel cha
The total charge accumulated by a certain device is given by as a function of timeby q=18t2-2t4 ( in SI units). What is the max charge in the interval 0<=t<=3s , and when does it occur
A 6-bit answer based on the selected Operation. The error bit is turned on if either no Operation is selected or more than one Operation is selected.
A 4-element unform linear array with interelement spacing of λ/2 is operated as a broadside array , find the beamwidth betwen nulls and the side lobe level in dB . in the above problem , it i