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a four pole, series motor runs at 900rev/min when taking 30A from a 230V supply. the total resistance ofthe armature and the series field is 0.8Ω. Calculate the additional series resistance required to reduce the speed to 500rev/min if the torque developed is:i) constant?ii) proportional to speed?iii) proportional to the square of the speed.(Assume the magnetic circuits is unsaturated.)
Given A series RLC linear circuit with an inductor1 of 0.5 Henry, followed by a capacitor 0f 0.01 Farad, followed by another inductor2 of 0.5 Henry and a resistance of 10 Ohms. 1 Specify the input impedance of this circuit Z(s).
If the circuit is driving a 100Ω load with a signal generator that has an output impedance of 50Ω and an open-circuit output voltage of .5sin(500t+30º), determine the steady state output voltage.
Consider a digital filter with frequency response: H(f)=11+f Assuming the sampling frequency is 1500Hz what is the frequency attenuation of a signal passing through this filter at 280Hz
How many different code words are there How many code words have exactly two 0's. If 0 and 1 are equally likely, what is the probability to obtain a code word with exactly two 0's
a)What is the voltage across a 220? resistor if the current through it is 5.6 mA b)What is the current through a 6.8? resistor if the voltage drop across it is 24 V c) What is the power delivered by a 6 V battery if the current drain is 750mA
The stator resistance Rs is 0.25 Ω, and the stator as well as rotor leakage inductances are negligible. All losses except in the stator and rotor resistances can also be neglected. The reflected rotor resistance, Rr' is 0.3 Ω. The magnetizing curr..
Use z transforms to find the ZIR yZI(k), the ZSR yZS(k), and the complete response y(k) for each system. (E+0.5){y(k)} = 0, y(0) = 0. (E2-3E+2){y(k)} = us(k), y(0) = 2, y(1) = 0. (us(k) = unit step sequence.)
The propagating pulse passes an observer at x=0. The peak of the pulse can be approximated by a parabola, v(t)=20 (1 - 10t^2), where v is the mV and t is in ms. (a) find the current along at x=0, t=0 (b) find the membrane current per unit area at ..
As current passes through the wires, the wires heat up, thus toasting the toast. Estimate the overall resistance of a heating element which is 220 cm long and consists of nichrome wire with a diameter of 0.56 mm.
Assume that all numbers are signed binaryintegers. The final quotient must be an 8-bit number stored in the AL register, and all registers other than AX (that is, AH and AL) should hold the same contents at the end of the sequence
An aluminum casting that has a mass of 10 kg sits on a steel surface. How much force will be necessary to get it to start sliding. The static coefficient of friction (mu) for aluminum on steel is 0.61.
A 2400-115V transformer has a sinusodial flux expressed by φ=0.113 sin 188.5t. determine the primary and secondary turns.
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