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Which amplifier class is the most efficient?

During a dive, oxygen levels are decreasing, but [el1] concentrations and [el2] levels are increasing.

In a FET, ID equal IS

What two criteria must be met for an amplifier to be a constant oscillator? Mark 2 choices below

What determines the bandwidth characteristics of the common-emitter amplifier shown in the figure below? Specifically, identify by part number or other component characteristic all the parts contributing to bandwidth at both low and high frequencies. Also explain (in words; no calculations are necessary) exactly how the components you identified affect gain with respect to frequency in the manner you have identified.

When set to the diode check setting on the DMM, what will the meter indicate if you forward bias the diode?

Does including an emitter resistor add or remove stability from a common emitter amplifier circuit?

What is the following circuit called? What does it do?

These were found on a blood sample from a Canary. Please name this parasite.         

What type of circuit is this? At least 3 details required