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An industrial assembly hall is continuously lighted by one hundred 40- W mercury vapor lamps supplied by a 120- V and 60- Hz source with a power factor of 0.65. Due to the low power factor, a 25 percent penalty is applied at billing. If the average price of 1 kWh is $ 0.01 and the capacitor's average price is $ 50 per millifarad, compute after how many days of operation the penalty billing covers the price of the power factor correction capacitor. ( To avoid penalty, the power factor must be greater than 0.85.)
A continuous time system is described by y(t) = t tan(x(t)). The continuous time system is sampled every T seconds to obtain a discrete time system y[n]. determine the mathematical expression for y[n].
an induction motor when connected in delta and started direct on line produces a starting torque of 60Nm and consumes 80A. if the same motor is started using the soft start equipment with the voltage set at 0.8 of the line
A CMOS output driver circuit on an IC is connected to an external transmission line. The NMOS and PMOS transistors have gate oxide thickness d = 2.0 nm and channel length L = 0.25 mum. The power rail is VDO = 1.0 V.
Why Can Discrete-Time FIR Digital Filters be a Linear Phase, Why can discrete-time FIR digital filters be made exactly linear phase, whereas IIR digital filters cannot?
a) What is the key difference between coherent and non-coherent demodulation b) Explain the concept of differential encoding for BPSK modulation.
3. For a simulated inductor application, to yield L = 75mH, R1 = 3kohm, and C1 = 200uF, determine required value of R2 4. For a constant current generator, with a saturation voltage = 20V and a current reference of 30mA, calculate RLmin.
SSB has an advantage over AM with respect to efficiency and power gain. Why, then, is AM commercial broadcast being replaced with SSB transmission
A somewhat discharged automotive battery has an open-curcuit voltage of 12.5 V and supplies 50 A when a 0.1 ohm resistance is connected across the battery terminals.
A certain magnetic core has a core loss of 8.4 W, of which one-third is eddy current loss, when the magnetizing field is changed 60 times a second. determine the core loss if the magnetizing field is changed only 50 times a second.
a 2000kg ship initially at rest in an inertial system is accelerated along a straight line for (3.16E7 seconds) by means of a photon rocket of 300MW power. If this is accomplised using a series of He-Ne lasers with wavelength=633 nm
Imagine a network layer packet that travels from one host to another host across multiple local area networks interconnected by routers, Explain how the packet moves from device to device through the network.
Calculate the efficiency of transmission at the IP level. Assume no options for the header and no errors. Calculate the efficiency of transmission at the data link layer. Assume no options for IP header and Ethernet-II format are used at the d..
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