Why are class C amplifiers so efficient?

In an n-channel JFET, when VGS grows negatively, does the channel widen, narrow or stay the same?

If you remove the load from the common emitter amplifier, does the gain go up, down, or have no effect?

What is the name of this circuit? What does the output voltage look like?  What is the purpose of the transistor?

London and Nunez (2000) had Pp read a trial summary in which the defendant was charged with sexual assault of a young girl. Critical photos of the victim, partly dressed or nude, found in the defendant’s home were absent, inadmissible because their inclusion was a due process violation, or admissible. How did confidence that jurors reached the correct verdict pre-deliberation compare?

What is the purpose of the op amp in the circuit below?

What are the 2 important features of a differential amplifier? (Mark 2 boxes)

What is the role of the AndroidManifest.xml file in an Android app?

Which diodes are forward biased in the circuit below given the indicated polarity at the secondary of the transformer. (Mark all that apply)

What is the typical barrier potential of Silicon?   _______ Volts