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Electronics and Communication Digital Communication Difficulty: Medium

Which of the following is not a permanent magnetic material? Three identical amplifiers with each one having a voltage gain of 50,input resistance of 1KΩ & output resistance of 250, are cascaded. The open circuit voltage gain of combined amplifier is The least attenuation of standard single mode optical fibers are at Consider an open - loop transfer function $$G\left( s \right) = \frac{1}{{\left( {s + 2} \right)\left( {s + 4} \right)\left( {{s^2} + 6s + 25} \right)}}.$$ What is the value of k which causes sustained oscillation in the closed - loop system? In monolithic integrated circuits, the concentration of acceptor atoms in the region between isolation islands will be