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A 200 volt dc shunt motor delivers an output of 17kW with an input of 20kW. the field winding resistances is 50 ohm and armature resistance is 0.04 ohm. maximum efficiency will be obtained when the total armature copper losses are equal
For a 64-PSK modulator with an input data rate(fb) equal to 36 Mbps and a carrier frequency of 100 MHz, determine the minimum double-sided Nyquist bandwidth(fN) and the baud. Sketch the output spectrum.
The electron distribution in the conduction band peaks at energies close to the conduction band edge. Using the Boltzmann approximation, find the energy in the conduction band (as a function of temperature) at which the electron density peaks
Design finite state machine that starts with even number of 1s and followed by odd numbers of 0s. Design finite state machine that starts with odd number of 1s and followed by even numbers of 0s.
Let a = 2 + j and b = 3 - xj be complex numbers where 'x' is an arbitrary constant. Let c = ab (i.e., complex number 'c' is the product of 'a' and 'b'). Calculate the magnitude of c as a function on constant 'x'.
Fuel cell systems that also utilize the heat produced can achieve efficiencies approaching 80 percent , more than double of the gas-turbine based electruiical generation . Assume that 25 million houuseholds produce an average of 5 kw.
A low pass filter has a cut-off frequency of 8kHz and a high pass filter has a cut-off frequency of 5kHz. These two circuits are connected back to back in cascade to form an input-output system.
A current source i(t) is connected to a 50 ohm resistor. Find the average power delivered to the resistor, given that i(t)is: a) 5 cos 50t A b) 5cos(50t-45 degrees A c) 5 cos 50t-2cos(50t-.873) A d) 5 cos 50t-2 A
A single phase full bridge inverter feds power at 50Hz to RLC load with r=5 ohms , l=0.3H and C=50μF. The dc input voltage is 220volts. (a) Find an expression for load current up to fifth harmonic
The other branch is an inductor with reactance of 8 ohms. If an external load is to be placed across the current phasor source, find the Thevenin source equivalent of the circuit described. Draw the original circuit and the Thevenin equivalent cir..
Describe potential problems that can occur with portable electric tools that might expose a worker to electric shock.
consider a fax/xerox outlet, processin files of various size. the size (in number of pages) of the files to be faxed or xeroxed has a geometric (p) and poisson (a) PMFs respectively. An arbitrary file arriving at the outlet is a fax file with prob..
A square pulse train (i.e. square wave) with low and high voltage values of VL= 0 and VH= 2.9 volts is applied to a DC voltmeter. The voltage measured by the instrument is 0.2 volts. The same signal is applied to an 99 O resistor.
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