Chemical Engineering Mcqs


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  • What turn ratio (Np/Ns) of transformer is required to match 4 O speaker to a transistor having an output impedance of 8000 O ?
  • For the same a.c. power output as above, what should be the minimum power rating of transistor for class B operation?
  • The maximum a.c. power output from a class A power amplifier is 10 W. What should be the minimum power rating of the transistor used ?
  • The class B push-pull circuit can deliver 100 W of a.c. output power. What should be the minimum power rating of each transistor ?
  • Power amplifiers generally use transformer coupling because transformer permits______________?

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