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Construction on Hoover Dam was started in 1931 and finished in 1935, and the dam was in service from 1936. When completed, it was both the world's largest electric power producing facility and the w
A current source, Is =16.5cos(2300t) A, a resistor R=134Ω, and an inductor, L=0.12H are all in parallel. Assume steady-state conditions exist. At t=3.9ms, find the power being absorbed by the
A 440 Vrms (line to line voltage) three phase induction motor runs at 1150 rpm driving a load requiring 15Nm of torque. The line current is 3.4 at a power factor of 80% lagging. Find the input power
An electric motor draws 120kW from the line and has losses equal to 20kW, Calculate the output power in HP and efficiency of the motor.
Find the Eb/no ratio in dB for a system operating at 10Mbps in a BW of 1MHz. the un-modulated carrier power is 0.1pW and the system noise temperature is 120 degrees Kelvin.
Derive an expression for the optimum value of the avalanche gain opt M for which the signalto-noise ratio (SNR) becomes optimum by using the following expression for the excess noise factor: Fa( M)=
Compare the noise floor in dBm with the GSM system (BW= 200 kHz) used by the European cell standards (available today in the US thru the AT&T acquired from the Cingular systems) assuming the sam
The channel bandwidth for the analog AMP's system is restricted to BW= 30 kHz. Determine the noise floor (in dBm) for its mobile receivers assuming all receivers have a noise figure of 10 dB.
You chanrge your capacitor above by connecting them to a non-ideal 30-Volt source with a Thevanin resistance of 5 ohm. Since you are careful not to go above the capacitor 25-V rating, design a circu
if 4 cells each rated for 2v, 0.15A connected as batterries in three different ways. find voltage and current rating of each type. (Hint - all in parallel, all in series, two groups of series connec
A 160-ft-diameter parabolic antenna is driven by a 10-W transmitter at 4.3 GHz. Calculate its effective radiated power (ERP) and its beamwidth.
Assume a receiver is located 10 km from a 50 W transmitter. The carrier frequency is 6 GHz and free space propagation is assumed. Assume the unit gains for the system gains. Find: a) The power at th
A 100µF capacitance is connected in parallel with the series combination of 10-mH inductance and a 1 ohm resistance. Calculate the impedance of the combination in polar form for angular freque
Assuming system gains of Gt = 0 dB, Gr = 3 dB, find the power received at the mobile using the two-ray ground reflection model assuming the transmitter antenna height to be 50 m, and the receiving a
Indicate the closest value to the change in decibels of the received signal for the given parameter change. The distance between transmitter and receiver for a one-way communication path is halved.
Design a DC-coupled differential amplifier with differential gain of 50 for input signals near ground, supply voltages of +15V and -15V and quiescent currents of 0.1mA in each transistor.
A propagating electromagnetic wave is described as follows (inset your own equation for Electric field). Determine if the wave is linearly polarized, left-hand elliptic polarized, right-hand ellipti
A 50Ω transmission line has a receiving end load impedance that produces a standing line wave with a trough on the line of 4.1V. The maximum voltage on the line is 8.14 absolute peak. The firs
A certain coaxial cables is designed to handle extremely high voltages. In order to prevent dielectric breakdown the electric field (E-field) must be minimized.Calculate the correct value of B to A
a 10 khz sinsudal signal is used to amplitude modulate a sinsoidal carrier frequency of 50 khz the number of frequency components that would be included in the resulting DSP AM waveform would be
An Ericson cycle operates on 0.227 kg of nitrogen from 650oC to 92oC. If 68kJ of heat is added during the isothermal expansion process, determine a) the overall expansion ratio; b) the heat transfer
A) What is the state diagram, extra states B) transition table, (8 states with 2 unused that need to be addressed) C) K-Maps D) Equations E) Logic Diagram: replace basic logic gates with NAND and Inve
The unused states have to be taken care of in such a way that Even numbered unused states will go to state 7 and Odd numbered states will go to state 3. The combinational logic portion of the circui
An AM modulator operates with the message signal: m(t) = 9 cos(20πt) - 8 cos(60πt). The unmodulated carrier is given by 110 cos(200πt), and the system operates with an index of 1/2. a. Writ
A measurement team has determined that the average path loss exponent in the system isn n= 3. Determine the major radius of each cell if a seven-cell reuse pattern is used. What is the major radius