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A 240kW 500 Volt 1750rpm separately excited dc generator has an overall efficiency of 94%. The shunt field resistance is 60ohms, and the rated current is 5amps. The I^2R loss in the armature is 0.02
A negative feedback amplifier has a close-loop gain Af=100 and an open-loop gain A=105. What is the feedback factor If a manufacturing error results in a reduction of A to 103, what close-loop gain
The nameplate on a 50-MVA, 60-Hz single-phase transformer indicates that it has a voltage rating of 8.0-kV: 78-kV. An open-circuit test is conducted from the low-voltage side, and the corresponding
A zener regulator circuit has a load resistance that varies between 470 ohms and 2700 ohms. The circuit uses a 10V zener diode, Rs = 330 ohms, and the source voltage is 24V. The zener resistance is
A DC source of 48V is connected to one end of the cable. The other end of the cable supplies a DC load. If the load current is 12.5 A, calculate the voltage drop due to the cable resistance and the
A dc power distribution cable has two #6 copper wires. The copper wire table in the textbook lists each wire as having resistance of Ro=.4028 ohms per thousand feet at temperature of 25C. The temper
The bottom of the conduction band at one end of a silicon resistor is at the same energy level as the top of the valence band at the other end. What current flows through the resistor if the resista
A touch sensor base on a piezoresistor built into a micromechanical cantilever made of silicon is cnnected in a Wheatstone-bridge configureation with a Vo = 1 volt. If L = 1.44cm and W = 1 cm
If the capacitor in the previous problem has a plate separation of 1 mm, what is the average displacement current, to the nearest tenth of a microamp, during that time period Assume a resistance of
a) Evaluate % overshoot, settling time and peak time if a=4 and b=25 b) Calculate values of a&b so imaginary part of poles remains same but real part increased by 2 times
Three series impedances of 33 ohm, 6j ohm and 87j ohm W are connected in star across a 220-V, three-phase supply. Sketch the circuit diagram and the phasor diagram (Take Vab as reference). Calculate
A turn contains three blue and seven white chips. A chip is selected at random. If the color of the chip selected is white, it is eplaced and two more white chips are added to the
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
Given 01110110110100011001101111110000 base 2, determine in base: a) Decimal b)Hexadecimal
what size capacitor should be placed in series with the series combination of 800 ohms and 20mH to give an admittance whose magnitude is 1m/ohm at w=10k rads/s
A resistor R, capacitor C, and voltage source Vs= 100 cos 300t Vare all in series. If the average power dissipated by the resistor is 150 W and the rms capacitor voltage is $) V, determine R and C.
a sample of 0 385 gram of cus was formed by heating a mixture containing 0.318 gram of copper and 1.00 gram of sulfure according to the reaction , Cu + S ---> CuS. A) is copper or sulfer the limi
y(t) + 0.2(dy(t)/dt) = x(t) a. Find y(t) if x(t) = 6(e^-2t)u(t) and y(0) = 3. b. In a. identify the zero-input and the zero initial condition part. c. In a, identify the systems-type and the input-typ
The difference in voltage (Bat A - Bat B) should be displayed on a +5V - 0 -5V meter. Each volt on the meter display should correspond to 10 mV of battery difference. Include your choice for all com
Three single-phase two-winding transformers, each rated 25 MVA, 34.5/13.8 kV, are connected to form a three-phase bank. Balance positive-sequence voltages are applied the high voltage terminals, an
Assume that the inverters have a delay of 1 ns and the other gates have a delay of 2ns. Initially A = 0 and B = C = D = 1, and C changes to 0 at time = 2ns. Draw a timing diagram and identify the tr
The range of an analog signal is 2 Vpp, and the samples of this signal are being quantized. The quantizer-output word size is 10 bit. What is the quantization interval Q
Three amplifiers with power gains of 15, 22 and 7 ate cascaded. The input power is 120 micro-W. What is the output power of the final amplifier stage
An amplifier has a gain of 10 and follow a bandpass filter filter where the loss in the in the center of the bandpass is 0.05. What is the combined gain/loss of the two cascaded blocks at the center
Referring to the circuit with switches connected to doors: Consider 3 doors, Doors A, B, and C. Design a circuit that will illuminate an LED only if both Doors A and B are closed or if Door A is c