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1. State the types of dc motors. What is the basis of the classification?
2. Based on emf and torque equation compare and contrast the two methods of speed control of dc motor.
3. How can one choose between a short shunt and long shunt cumulatively compound dc motor?
4. List the factors involved in voltage build-up in a shunt generator.
Three of the above single phase transformers are connected as a 3-phase transformer bank. The high voltage side of the transformer bank is connected in Y and the power is supplied to the transformer bank through a transmission line
If not, find another value of T consistent with the information given.
a three- wire system has a balanced Y- connected load with a75-Ω resistance, 125- mH inductance, and 55-μFcapacitance in series from each line to the neutral point. assuming positive phase sequence with Vp= 125V at 60 Hz
The signal given is x(t) =cos(440*2*pi*t) +cos(554*2*pi*t)+cos(659*2*pi*t) Find the complex exponential forier series of the signal and plot k vs Ck for k=-1000 to 1000.
An EKG signal is contaminated by 60-Hz noise. Design a bandstop filter to remove this noise while limiting distortion of the EKG signal. Sketch the magnitude and phase response.
Combined Drude / Lorentz medium. A large number of metals, including nickel, silver, and platinum [5], are modeled with a combined Drude / Lorentz model of the susceptibility.
A pn-junction is uniformly doped and has dopant concentration of NA = 4 x10^16 cm^-3 in the pregion at 300K. At zero bias, 20% of the total space charge region (W) is extended in the pregion. Calculate Vbi, ND, W, xn and xp.
Show C code implementations for these two functions.
Investigate the small-signal voltage gain, input resistance, and output resistance as a function of the transistor width-to-length ratio, using a computer simulation.
a) Construct a state table and the state graph for the given network. b) What is the the output for the following input secuence X=01011. note: Di and Qi are the input and the output respectively of each D-type flip-flop.
Determine whether the system described by (1) y[n]=log(nx[n]), (2) y[n]=sqrt(n)*x[n+1], (3) y[n]=x[n-2]u[n], where a is an integer and |a|>1, is (i) memoryless; (ii) invertible; (iii) causal; (iv) stable; (v) time invariant; (vi) linear
The average wind speed for Chicago is 10.3 miles per hour. What percentage of the cities have average wind speeds in excess of Chicago's?
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