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Describe how a medium which amplifies light can be turned into a laser oscillator and describe the spectrum of the output. What are the requirements for oscillation? What happens to the spectrum and time domain output when the laser is mode-locked? Why is a four-level system normally more efficient than a three-level system? What are the primary characteristics of an argon laser?
discuss the flat and segmented memory models and provide an example of how each are used to specify a memory
List the basic principles or factors thatneed to be considered during design of a power distribution system. Describe how a shunt capacitor can be used to improve voltage regulation on a distribution network
A rectangular strain gage rosette attached to an aluminumsurface comprises three identical gages (gage factor = 2.1) ofnominal resistance 200 ohms are each connected into a Wheat stonebridge having 3 other resistance values also of 200 ohms.
A 250V rms system is supplying three parallel loads. One draws a 20kW at unity power factor, a second uses 25kVA at PF=.8 lagging, and the third requires a power of 30kW at a lagging PF of.75
Give five examples of things that are measured in semiconductor manufacturing to help maintain quality. Explain how a prober can give a false reading. How is sort different than E-test.
Four Resistors are connected in parallel. what is the equivalent resistance if their individual resistances are r1 =100 Ohms ±5% tolerance r2 =470 Ohms ±5% tolerance r3 =330 Ohms ±10% tolerance r4 =1000 Ohms ±5% tolerance
Determine the current i(t) flowing through a resistor if the cumulative charge has flowed through it up to time (t) is given by a) q(t)=3.6t mC b) q(t)=5sin(377t) uC c) q(t)=0.3[1-e^-0.4t] pC d) q(t)=0.2t(sin(120pi(t))) nC
Two cover plates, each 1/2 in. thick, are welded to a W27 X 84 beam as shown. Knowing that l = 10 ft and b = 10.5 in
Consider a Δ-connect, 25 kVA, 480 V, 60 Hz, six pole synchronous generator. The field current is set such that the line voltage is 504 V when supplying a rated load. Consider the armature resistance to be negligible.
Explain why AC Needs More Insulation Than DC for the Same Working Voltage Level?
What is the smallest frequency that can be used to sample each of the following continuous-time signals such that the signal can be recovered from the discrete samples (a) \(x(t)=1+cos(2000\pi t)+cos(4000\pi t)\)
consider a running motor with Z = 6 + j7 ohm A) calculate the line crurrent if the motor is operated at 120 VAC RMS B) calculate the required paralell capacitor value to reduce the line current to a minimum
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