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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?
to sketch on common axis graphs to illustrate the response curve of secondary current against frequency when the
Are these distances in the far-field region of the antenna? (Assume a circular reflector, with an aperture efficiency of 60%.)
[Hint: As you should explain, this is equivalent to showing that the sum of two forward light-like vectors is forward time-like, unless the spatial parts are parallel.]
use only DC power sources and it should power a string of LEDs by replacing individual lights by a buch a bunch of them. calculate frequency, wave type(square, sine, triangular, etc) and max and min volages seen by the LEDs.
Implement the circuit with a block diagram decoder (you don'tneed to show the internal implementation of the decoder) and OR gates only. Implement the following Boolean function with a multiplexer.
The voltage and current at the terminals of an ideal element are 0, for t _ (minus equal) 0s. V(t) = 100(1-e^(-300t) V, i(t) = 15e^(-400t) mA. Find the maximun power absorbed by the element by the element at t = 10ms
use nodal analysis to find io in the network given below. identify and label each node otherwise you will lose your
Assume the initial state is steady (y = 0 at t = -0) a) Determine the transfer function of this process in the s domain. b) If the input is a ramp change in u(t) = 4t, determine the value of y(t) when t = 10s.
A synchronous generator is rated 1,300 MVA, 22,000 volt, three phase, 3600 rpm, 60 Hz with a synchronous reactance of 0.35 ohms per phase. The machine is delivering rated output at rated voltage and 0.94 power factor lagging.
design a simple 4-bit binary divider , takes two numbers from only 0 to 9. This circuit will perform A/B and B > A will give zero, the answer will be just the integer part ( for example : o111 / 0010 = 0011 ).
A system or component is imaginary (critically ) stable if at least one real part of the roots of the characteristic equation is equal to zero. Determine the stability of the following system and design the circuit.
find values of resistance, voltage, and current for total and all 3 voltage drops where only certain information is given out of three voltage drops info given total voltage is 12v, resistance 1 is 2.2KO, resistance 2 is 1.6KO, and resistance 3 is..
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