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A three phase 12 pole, 220-V, 60- hz ,50 hp squirrel cagemotor , operating at rated load, has a speed of 595 r/min, anefficiency of 89 percent ,and a power factor of 81 percent lagging.The locked rotor current and locked rotor torque at a rated voltage and rated frequency are 725A and 120 percent rated torque,respectivtively. Determinea) rated line currentb)rated torquec) minimum voltage required to obtain a blocked- rotor torque equal 70 percent rated torqued) auto transformer bank ratio required to provide the minimumvoltage in (c)e)stator current at blocked rotor with auto transformer incircuit;f) corresponding input current to the transformer when starting the motor at the voltage in (c)
Provide a simple class definition and then provide the syntax and the rationale for declaring an array of objects of the class. Also explain the dimension of the array and why you chose that number of elements for the object array.
An engineer needs to detect a binary strings of any length or composition provided that each contains at least one substring of "1101". a) Draw the state diagram of this finite state machine.
The voltage across a resistor is given by Ohm's Law: V=R I. Write a program that asks for resistance R in ohms, and current I in amps for several resistors, then calculates and displays the voltage across each resistor.
A tractor-trailer truck driver friend often delivers to companies that do not have a fork truck or loading dock. She wants to install a lift-gate on her trailer so she can load and unload her truck without a fork truck.
A device with input x(t) and output y(t) is characterized by: y(t) = x2(t).An FM signal with frequency deviation of 90 kHz and modulating signal bandwidth of 5kHz is applied to this device. What is The bandwidth of the output signal.
The silicon substrate is N-type (doping level ND = 7x10^16cm-3), and the gate is heavily doped N+-type polysilicon. Assuming zero oxide charge density, determine the density of mobile charge at the semiconductor surface, if the voltage applied bet..
Single Phase Circuit, A resistor and a capacitor are connected in series across a 150 V a.c supply. When the frequency is 40 Hz the current is 5 A
A lossless transmission line is embedded in a medium having a dielectric constant of 9. The per-unit length capacitance of the line is given as 100 pF/m. a.Find the wave velocity in the medium.
Explain how energy efficiency can be traded off for bandwidth efficiency by multilevel modulation schemes. Rank the following modulation schemes: 64-ary PSK, Binary FSK, QPSK in terms of bandwidth efficiency and energy efficiency.
A three-phase, 2000-kVA, 12-kV, 1800-rpm synchronous generator has a synchronous reactance of 20 ohms per phase and negligible armature resistance.a. The field current is adjusted to obtain the rated terminal voltage at open circuit.
A half wave dipole antenna is operating in air at a frequency of 100 MHz. At a distance of 1000 km and at an observation point ? = ?/2, electric field strength is measured to be 5 µV/m. Calculate the a. Length of the antenna
A silicon (ni= 10^10 cm^-3) p-n junction diode has a maximum electric field of -10^6 V/cm and a depletion layer width of 1 um. The acceptor density in the p-type region is four times larger than the donor density in the n-type region.
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