# Electronics - Field Effect Transistors (FET) - Discussion

### Discussion :: Field Effect Transistors (FET) - General Questions (Q.No.2)

2.

When an input delta of 2 V produces a transconductance of 1.5 mS, what is the drain current delta?

 [A]. 666 mA [B]. 3 mA [C]. 0.75 mA [D]. 0.5 mA

Explanation:

No answer description available for this question.

 Shalini said: (May 28, 2011) delta Id/delta Vi = Gm Gm=tranconductance=1.5 milli Siemens Id=Gm*Vi

 Neeraj Kumar said: (Jul 13, 2011) Thanks to Shalini. I just wanted to see the formula used.

 Sumit Patel said: (Aug 14, 2011) Thanks shalini to remember Gm=1/R=1/Resistance=Transconductance

 Saranya said: (Dec 27, 2011) Thanks to shalini.

 Ganesh said: (Mar 8, 2012) Gm=Iout/Vin

 Hegde said: (Feb 22, 2014) dI/dV = gm(transconductance). >dI = gm*dv. >dI = 1.5m*2;. >dI = 3mA.

 Shreevidya said: (Sep 19, 2014) Id = 2 sqrt(gm*Vgs). gm = 1.5x10^-3. Vgs = 2. So Id = 3mA.

 Bill said: (Aug 23, 2017) What is the input delta, what is the drain current delta?

 Shadan said: (Nov 24, 2017) Transconductance(gm)= Del( ID) /Del( VGS) and also Transconductance is reciprocal of resistance so we no that Resistance =V/I. so transcondustance=I/V. Then you will found 3mA.