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Consider a shunt-connected dc motor that has the magnetization curve shown in Figure. The dc supply voltage is VT = 200 V, the armature resistance is RA = 0.085 Ω, the field resistance is RF = 10 Ω, and the adjustable resistance is Radj = 2.5 Ω. At a speed of 1200 rpm, the rotational loss is Prot = 1000 W. If this motor drives a load that demands a torque of Tout = 200 Nm independent of speed, determine the motor speed and efficiency.
IS-95 operates over a bandwidth of 1.25 MHz. The delay spread is 1 µs, the coherence time is 50 ms, the delay constraint (on voice) is 100 ms. The SINR each user sees is -17 dB per chip. Estimate the 1%-outage capacity for each user. How far is th..
Input Xi and Yi of each Full Adder circuit in an arithmetic circuit has the digital logic specified by the following Boolean functions: Xi =Ai Yi = B*iS + BiCin* Where S is a selection variable, and Cin is the input carry, and Ai and Bi are the inp..
Capacitance can be altered by bringing the two wire line close to ground. (a) Apply the method of images to determine the Capacitance of the two-wire line shown in the figure, where the lower wire is suspended a distance from the PEC ground.
A circuit consists of a voltage source (Vin = 10 V at 75o phase shift, ω = 10 rad/s) in series with a parallel RL combination (R = 10 Ω, L = 0.5 H), which is in series with a capacitor (C=0.05 F). What is the value of Vo(t) across the capacitor
Estimate the equilibrium temperature rise and estimate the time constant - write an expression for the estimated curve (theta as a function of time) using the numerical results obtained in parts a and b.
Draw the state graph for a car wash controller which has 3 different kinds of washes a simple rinse-only wash, a rinse-soap-rinse wash, and a rinse-soap-rinse-blow dry wash. The first two of these wash types are the same as those in this chapter. Sta..
A steam radiator in a room at 25oC has saturated water vapor at 110 kPa flowing through it, when the inlet and exit valves are closed. What is the pressure and the quality of the water, when it has cooled to 25oC? How much work is done?
If the cutoff between "insecure" and "secure" were x amount of time, how long would a secure password have to be. State and justify your assumptions regarding the character set from which the password is selected and the amount of time required to..
Three single-phase transformer are used to form a three-phase transformer bank rated 13.8kV(delta)/120kV(wye). One side is connected to a three-phase load of 12 MVA at 0.8 power factor lagging. Determine the turns ratio of each transformer
Design a 3-bit synchronous counter that counts the sequence 7, 4, 2, 1, 6, 5, 7, ect. Use "don't-cares" for the "next states" of the unwanted states. Use a D flip flop for the most significant bit, a T flip flop for the middle bit, and a JK flip f..
We have v1(t)=10cos(wt+30degrees). The current i1(t) has an rms value of 5A and leads v1(t) by 20s. (The current and the voltage have the same frequency) Draw a phasor diagram showing the phasors.
Internet explorer cannot display the webpage, is that a hardware or software problem?
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