Discussion

Answer: B

Forward bias makes the gate junction conduct, so the input impedance collapses and the device no longer behaves as a voltage-controlled one. The channel is not damaged, breakdown is unaffected, and the transconductance would actually be high. The device's defining virtue is its non-conducting gate, so any condition that makes the gate conduct removes the reason for choosing it. Naming the cost of a choice alongside its benefit is what turns a fact into a design decision. The shared properties explain why these belong to one family, and the differences explain why more than one exists. Framing the question as which quantity the change acts upon makes the answer follow without calculation. The quantity that varies and the quantity that does not are worth naming before any substitution is attempted. Checking the units of each quantity catches a wrong formula before the arithmetic begins. Checking the units of each quantity catches a wrong formula before the arithmetic begins. The quantity that varies and the quantity that does not are worth naming before any substitution is attempted. The quantity that varies and the quantity that does not are worth naming before any substitution is attempted. The quantity that varies and the quantity that does not are worth naming before any substitution is attempted. The quantity that varies and the quantity that does not are worth naming before any substitution is attempted.