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Two balanced Y-connected loads in parallel, one drawing 15 kW at 0.6 power factor lagging and the other drawing 10 kVA at 0.8 power factor leading, are supplied by a balanced, three-phase, 480-volt
A GaAs device is doped with a donor concentration of 3e^15/cm^3 . For the device to operate properly, the intrinsic carrier concentration must remain less than 5% of the total electron concentration
a sound distribution system has the following outputs 10 watts at 8ohms,5watts at 4 ohms, 15 watts at 16 ohms and 2 watts at 4 ohms if the input to the amplifier is 20 millivolts at 600 ohms how muc
Impulse Responses of LTI systems can be physically found by inputting \(x[n] = \delta[n]\)to the system and measuring the output. Assume that during the process, we inadvertently input\(x[n] = \delta[
Line A extends from (2,2, 0) to (-2, 2, 0) and Line B extends from (2, -2, 0) to (-2, -2, 0). Each has a linear charge density l = 1 nC / m. You want to calculate the magnitude and direction of the
The voltage and current at the terminals of an ideal element are 0, for t < 0s. For t >_ (minus equal) 0s. V(t) = 100(1-e^(-300t) V, i(t) = 15e^(-400t) mA. Find the maximun power absorbed by t
A fiber optic audio system consists of an input, a playback head that has a transfer function of .7, an amplifier with a gain of 6 and a speaker system with a transfer function of .4. Find the outpu
find the series element or elements that must be in the enclosed container to satisfy the following conditions. a. average power to circuit = 300W b. circuit has a lagging power factor
Suppose that a family of logic gates considers the output ranges of [0 - 0.2V] as "0" and [3.1V-3.3V] as "1". What are the reasonable input ranges for "0" and "1"? (a) "0": [0.1 - 0.4V], "1": [2.3V
Explain why the following act lead to hazardous safety conditions when working with electrical equipment. (a) wearing metal rings or bracelets (b) being barefoot,(c) working on damp or concrete floor
draw a digital design consisting of 2 input AND gates and three inverters, where an inverter is connected to each of the AND gates input and its output. For each of the four possible combinations in
1. The current in a circuit is 1 amp. What will the current be when the voltage is increased by 50% 2. A 10ohm resistor is connected across a 12 V battery. How much current is there through the resist
A long straight metal wire of radius r1= 2.20E-2 m is surrounded by a metalic cylindrical shell of inner radius r2= 1.24E-1 m and outter radius r3= 1.91E-1 m. The axes of the wire and the cylindrica
A glass tube with a cross-sectional area of 9^-2 m^2 contains an ionizd gas. The densities are 10^15 positive ions/m^ and 10^11 free electrons/m^3. Under the influence of an applied voltage, the pos
A container with a plunger compresses one pound mole of an ideal gas from 1 atmospheres pressure to 10 atmospheres. Calculate the amount of work done if the process is considered to be polytropic.
A burst of 8^14 electrons accelerated to an energy of 12 MeV per electron is stopped in a copper target block of mass 180 g. If the block is thermally insulated, what is its temperature rise
What value of emitter resistor would you choose, if: a) You have to amplify the signal of a microphone that has an internal resistance of 100K using a Common Emitter bias configuration b) you have t
Assume that a receiver has a first amplifier stage with a 5KW input resistance, a gain of 300, an input audio signal of 20 mV, and an operating temperature of 27oC. When the amplifier is operating w
Calculate the amount of work done if the process is considered to be polytropic. Assume the temperature to be 273K and the value of k for the process to be 1.4. All losses are neglected.
an amplifier with a 1 MHz bandwidth and a 20 mV input signal. The input noise = 1 mV, output signal = 6.0 mV, and output noise = 1 mV. Find: (a) SNR at the input (b) SNR at the output (c) Noise figur
A computer has a word length of 8 bits including sign. A= 10101011, B = 01101111 are 2's complement numbers. Perform the following operations and indicate whether overflow occurs: (2p) (a) A+B (2p)
A 300 ohms resistor is connected across the 300 ohms antenna input of a television receiver. The bandwidth of the receiver is 6 MHz, and the resistor is at room temperature (20' C). Find the noise p
Assume that a receiver has a first amplifier stage with a 5K input resistance, a power gain of 300, an input audio signal of 20 uV, and an operating temperature of 27'C. When the amplifier is operat
a)Determine I, VR, and Vc in phasor form. b)Calculate the total power factor, and indicate whether it is leading or lagging. c)Calculate the average power delivered to the circuit. d)Draw the impedanc