Problem: A commutator is a mechanism used to switch the input of most DC machines and certain AC machines consisting of slip ring segments insulated from each other and from the electric motor's shaft. The motor's armature current is supplied through the stationary brushes in contact with the revolving commutator, which causes required current reversal and applies power to the machine in an optimal manner as the rotor rotates from pole to pole. In absence of such current reversal, the motor would brake to a stop. In light of significant advances in the past few decades due to improved technologies in electronic controller, sensorless control, induction motor, and permanent magnet motor fields, electromechanically commutated motors are increasingly being displaced by externally commutated induction and permanent-magnet motors.
What would a rotor do with current reversal?
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Answer: unanswerable

Problem: Extensive and diverse public spending is, in itself, inherently at risk of cronyism, kickbacks, and embezzlement. Complicated regulations and arbitrary, unsupervised official conduct exacerbate the problem. This is one argument for privatization and deregulation. Opponents of privatization see the argument as ideological. The argument that corruption necessarily follows from the opportunity is weakened by the existence of countries with low to non-existent corruption but large public sectors, like the Nordic countries. These countries score high on the Ease of Doing Business Index, due to good and often simple regulations, and have rule of law firmly established. Therefore, due to their lack of corruption in the first place, they can run large public sectors without inducing political corruption. Recent evidence that takes both the size of expenditures and regulatory complexity into account has found that high-income democracies with more expansive state sectors do indeed have higher levels of corruption.
The potential for corruption in public spending are one of the arguments that favor what?
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Answer: privatization and deregulation

Problem: FETs are further divided into depletion-mode and enhancement-mode types, depending on whether the channel is turned on or off with zero gate-to-source voltage. For enhancement mode, the channel is off at zero bias, and a gate potential can "enhance" the conduction. For the depletion mode, the channel is on at zero bias, and a gate potential (of the opposite polarity) can "deplete" the channel, reducing conduction. For either mode, a more positive gate voltage corresponds to a higher current for n-channel devices and a lower current for p-channel devices. Nearly all JFETs are depletion-mode because the diode junctions would forward bias and conduct if they were enhancement-mode devices; most IGFETs are enhancement-mode types.
What type of FET is more common?
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Answer:
unanswerable