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1. By what test on dc reparalely excited generator would you determine the armature reaction equivalent field current at rated armature current.
2. Assuming magnetic linearity derive the expression for speed-torque characteristic of a dc series motor using suitable symbols.
3. Compare the speed troque characteristices of a series and cummulative compound motor. Why does the compound motor have a defenite no-load speed?
4. Sketch the external characteristic of a shunt generator and explain the reason for its special nature: part of it is two-valued.
What are the wellbeing, behavioral and way of life results of liquor utilize and abuse?
The saw tooth waveform of Problem P6.5 is applied as the input to a filter with the transfer function shown in Figure P6.15.Assume that the phase of the transfer function is zero for all frequencies. Determine the steady-state output of the filter..
Compare the characteristics of a dc current source with those of a dc voltage source. - How are they similar and how are they different?
In 1988, the average wage rate was $9.45 an hour and in 2008 the average wage rate was $18.00 an hour. The CPI in 1988 was 118.3 and in 2008 it was 215.3 . Which real wage rate is higher?
on an oscilloscope grid, the vertical axis is set to 1V/division, and the horizontal (time) axis is set to 1 ms/division.The postion of the CRT trace has been adjusted so that zero volt(ground) corresponds to the horizontal line in the center ofth..
An NRZ-L signal is passed through a filter with r = 0.5 and thenthen modulated onto a carrier. The data rate is 2400 bps Evaluate the bandwidth for ASK and FSK. For FSK assume that the twofrequencies used are 50kHz and 55kHZ.
how does your answer change if the bubble is elongated in the direction of the electric field and sphere and the dielectric shell are placed in an initially uniform electric field E 0 in the z direction.
Two charged concentric spherical shells have radii 10.0cm and 15.0cm. The charge on the inner shell is 4.00X10^-8C, and that on the outer shell is 2.00X10^-8C. Find the electric field (a) at r = 12.0cm and (b) at r = 20.0cm.
A 480-V, 60 Hz, six-pole synchronous motor draws 80 A from the line at unity power factor and full load. What is the output torque of this motor? Express the answer both in newton-meters and in pound- feet.
The 4 sources are I0 I1 I2 I3 and the output is Y (note that these are all 3-bit words). Individual bits of I0 are I0(0), I0(1), and I0(2); individual bits of I1 are I1(0), I1(1), and I1(2); and so on. The select signals are s1 s0 (s1 is the msb a..
Illustrate using block diagrams the pulse reflection techniques for; - Typical system. - Idealized outgoing and reflected pulse waveforms.
A 6-pole, 50 Hz induction motor has a rotor resistance of 0.25 Ω and a maximum torque of 180 Nm while it runs at 860 rpm.
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