Chemical Engineering Mcqs

Submitted By: Ali Uppal

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  • 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_________?
  • An amplifier using an opamp with slew rate SR=1v/µsec has a gain of 40db.if this amplifier has to faithfully amplify sinusoidal signals from dc to 20 KHz without introducing any slew-rate induced distortion, then the input signal level must not exceed________?
  • An npn BJT has gm=38mA/v, cµ =10¯14 F, cπ =10¯13F and DC current gain β0=90.For this transistor fT & fβ are________?
  • The MOSFET switch in its on-state may be considered equivalent to_____________?
  • . If =0.98 ,Ico=6µA and Iβ=100µA for a transistor,then the value of Ic will be______?

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