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A 5 horsepower dc mahine is supplied with 120 V dc and delivers rated power at 1000 rpm. The machine has an efficiency of 80 %. What is the developed torque at the output
A coil wound around a ferromagnetic core is supplied by a 120V, 25 Hz source. Determine the percent change in eddy-current loss if the coil is connected to a 60Hz source with the same flux density.
The flux through the window of a 20-turn coil varies with time in the following manner: flux=1.2 sin(28*t) Wb. Determine a) the frequency and rms value of the voltage generated in the coil, b) the e
Determine the rotational speed required to generate a sinusoidal voltage of 24V in a 25-turn coil that rotates within two pole field of 0.012 wb/pole.
If inductive load has a 2ohm resistance and 2microhenry inductance in series with a 120V/60Hz source and a capacitor is connected parallel to the entire load so no reactive power is being delivered
An ideal p-n junction diode is reverse biased with a voltage of 30 mV. If the reverse current at this voltage is 1 pA and the area of the diode is 100 µm x 100 µm, what is the reverse sa
Find the electric flux density field everywhere in space produced by two concentric spherical shells of surface charge density +ro and -ro of radius ‘a' and ‘b', respectively, where a<
Find the electric flux density field produced by a uniformly charged infinite cylinder of radius ‘a' using Gauss's law.
In a test of a printed circuit board using a random test pattern, an array of 10 bits is equally likely to be 0 or 1. Assume the bits are independent. (a) What is the probability that all bits are 1
An object of mass m = 0:1 kg is dropped from a high tower. Suppose the magnitude of the force due to air resistance is 0:98v2. (The gravitational constant is g = 9:8 m s2 ). a) Write down the dieren
A labor intensive process has a fixed cost of $338,000 and a variable cost of $143 per unit. A capital intensive (automated) process for the same product has a fixed cost of $1,244,000 and a variabl
One of the firm's suppliers discounts prices for larger quantities. The first 1000 parts are $13 each. The next 2000 are $12 each. All parts in excess of 3000 cost $11 each. What are the average cos
consider a scenario where there is a direct path from bs to ms,while other multipath components are reflected from a nearby mountain range.the distance between the bs and ms is 10km and the distance
A parallel-plate capacitor has plates of very large extent such that the electric field is perpendicular to the plates. The plates are separated by a distance of 1mm, and a voltage of 100 V is appli
Consider the hypothesis that an isolated hair cell (the sensory cell within the cochlea) can be modeled as a linear system when a pure acoustic tone is the input and the rate of neural firing is the
An open container holds ice of mass 0.505 kg at a temperature of -11.0 Celsius . The mass of the container can be ignored. Heat is supplied to the container at the constant rate of 900 J/minute . Th
The pressure of the gas within the bag remains at 1 atm and its temperature remains at room temperature 20.0 Celsius. How many moles 'n' have been introduced into the bag by the time its volume reac
Given f1(t) = 28.2843 cos ( 100t - 30) and f2(t) = 14.1421 sin (100t + 15), what's the phasor value of f1(t), F1 and f2(t), F2 The sum of f1(t) and f(2)t is f3(t), where f3(t) = Fm cos(100t - theta)
The load on a 460-v, 60-Hz, Y-connected, balanced three phase source consists of three equal Y connected impedance of 100-j100 Ohms and three equal delta-connected impedance of 300-j300 Ohms.
A series circuit has a resistance of 1 ohm and an inductance of 1 ohm. The voltage across the circuit has an amplitude of 15 volts and a phase shift of 30 degrees. What is the current of the circuit
WHAT ELECTRICAL PARAMETER DOES AN OHMMETER MEASURE AND WHAT ARE ITS UNITS. SHOW BOTH NAME AND SYMBOL FOR THE PARAMETER AND ITS UNITS.
A p-n junction solar cell has Voc = .5 V and Jsc = 20 mA/cm2. A second cell of same area has Voc = .6V and Jsc = 16 mA/cm2. Assuming both cells obey ideal diode equation find the values of Voc and J
The power delivered to the element is p(t) = 4.9e-8t W. Compute the current in the element as a function of time, the voltage across the element as a function of time, and the total energy delivered
A magnetic circuit constructed of sheet steel has an average length of 1.3 m and a cross sectional area of 0.024msq. a 50 turn coil wound on the ring has a resistance of .82ohms and draws 2a from a
The design specifications for a simple inverting amplifier require an input resistance of 10kOhm and a voltage gain, A=-6.2 a) prepare a design using an ideal OpAmp b)If a real OpAmp with the properti