Assertion: transistor's voltage | /r/CapableOf | restrict its cross-sectional area
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Source sentences:
text: Constriction of the conducting channel is accomplished using the field effect: a voltage between the gate and the source is applied to reverse bias the gate-source pn-junction, thereby widening the depletion layer of this junction (see top figure), encroaching upon the conducting channel and restricting its cross-sectional area.