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Two-wattmeter method is used to measure the power taken by a 3-phase induction motor on no load. The wattmeter readings are 375w and -50w.
Calculate;
i) power factor of the motor at no load.
ii) phase difference of voltage and current in two wattmeters.
What is the (approximate) maximum electric field intensity for which constant mobility may be assumed for electrons in silicon. In a digital circuit with a supply voltage of 1V, what is the corresponding gate length for MOS transistors.
Suppose X has a continuous uniform distribution over the interval [-1, 1]. (a) Determine the mean, variance, and standard deviation of X. (b) Determine the value for x such that P(fx
Suppose a resistor whose value is equal to the motor resistance is connected across the motor terminals and the motor is spun at 200 RPMs. What will be the voltage measured across the motor terminals
a. design a half-subtractor circuit with inputs x and y and outputs Diff and B out. the circuit subracts the bits x - y and places thedifference in Diff and the borrow in B out. b. design a full- subtractor circuit with three inputs x,y,B in andtwo..
Write a program which accepts the frequency of an electromagnetic wave in megahertz and then displays to the user whether the frequency falls in the FM band, AM band, or neither.\FM radio falls between: 87.7 to 108.0 MHz.
Build a 4-to-1 MUX using some tri-state buffers and two inverters(NOT gates). (Hint: you can build a 2-to-1 MUX using some tri-statebuffers and one inverter and then combine several 2-to-1 MUXes tobuild a 4-to-1 MUX.)
assume QPSK is the modulation method used in a digital communication system.The communication system requires minimum bit error.what is the acceptable bit error assuming additive white gaussian noise.
A second-order PLL is implemented with a non ideal loop filter: H(s) = (s+a)/(s+b) in which b > 0 is very small. (a) Applying small-signal analysis, determine the transfer function between Oe(s) and Oi(s).
Let x(n) be the input signal to a discrete-time filter with impulse response hi(n) and let yi(n) be the corresponding output. These sequences are written such that the first value islocated at instant n=0. (a) Plot x(n) and y1(n).
How many turns are required for a circular loop of 100-mm radius to develop a peak emf of 10mV if the loop rotates 30r/s in the earth's magnetic field Take B = 60E-6T.
design a circuit to compute F=(A*B*C) +3*D+12,A,B,C and D are 16 bit inputs and F is a 16 bit output. Use 16 bit multiplier and adder components, and ignore overflow issues.
Consider an AlGaAs based heterostructure laser diode which has an optical cavity of length 200 microns. The peak radiation is at 870 nm and the refractive index of GaAs is about 3.7. What is the mode integer m of the peak radiation
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