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Write a report on the Chernobyl nuclear disaster. Identify the sequence of events that led to the disaster. In your opinion, can this accident occur in the United States? Why?
Suppose a certain causal signal f(t) has a Laplace transform F(s) = 1. If f(t) is sampled at times kT where T is a constant time interval and integer k>=0, what are the sample values
A linear time-invariant continuous-time system has the impulse response below: h(t) =[cos 2t + 4 sin 2t]u(t) 1. Determine the transfer function H(s) of the system. Use the Laplace transform pairs table for this. 2. Plot the system impulse response..
A 138-kV, three-phase short transmission line has a per-phase impedance of (2+j4) ohms. If the line supplies a 25-MW load at 0.8 power factor lagging, calculate (a) the efficiency and (b) the sending-end voltage and power factor.
when the remaining sources of e.m.f. are replaced by conductors, the resistances of which are equal to the internal resistances of the respective sources.
Show how regulation and efficiency are determined for medium lines using end-condenser method.- Discuss the following terms as applied to transmission lines: - Voltage regulation.
The load on a 460-v, 60-Hz, Y-connected, balanced three phase source consists of three equal Y connected impedance of 100-j100 Ohms and three equal delta-connected impedance of 300-j300 Ohms.
A load operating at 2300 V rms draws 28 A at a power factor of 0.812 lagging. Find (a) the peak current in amperes; (b) the instantaneous power at t=2.5 ms assuming an operating frequency of 60 hz; (c) the real power taken by the load.
Suppose that the input voltage to an amplifier has a peak amplitude of 100mVand contains components with frequencies ranging from 1 to 10 kHz. We want the output voltage waveform to be nearly identical to that of the input except with larger ampli..
A 240/40 volt transformer supplies two different secondary loads. One load (a) draws a current of 12 amperes at a lagging power factor of 0.94. The other load (b) draws a current of 12 amperes at a leading power factor of 0.94.
We wish to build a machine with as great a flux density as possible while avoiding excessive saturation in the core. What would be a reasonable maximum flux density for this core?
Determine the lateral shift at the output of the plate and the retardation between the ordinary and extraordinary beams - Sketch the beams
Do this for both series and parallel resonators.
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