____ amplifiers are used for high gain at low frequencies or for amplification of a direct-current signal.
A. Operational
B. Audio
C. Direct-coupled
D. RF
Answer: C
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A. Forced feed B. Splash feed C. Wick feed D. Gravity feed
A soil has a thick black A horizon, a distinct B horizon, has reasonably stable soil structure, and was formed under grassland natural vegetation. In which suborder is it most likely classed?
A) aquents B) ustalfs C) cambids D) udolls E) udults
The operator must be held in the on position for maintain contact type switches to have their NO contacts shorted
Indicate whether the statement is true or false
In an RC parallel circuit, the supply voltage is 120 V, 60 Hz. The resistance is 40 ? and the capacitive reactance is 30 ?. What is the capacitance of the capacitor?
A. 37.89 ?F B. 53.05 ?F C. 66.31 ?F D. 88.42 ?F