Consider the following statements regarding JFET:

1. The relationship between the drain current and gate-to-source voltage of a JFET is a nonlinear.

2. The minimum current for JFET occurs at pinch-off voltage defined by V_GS = V_P.

3. A current controlled device is one in which a current defines the operating conditions of the device.

Which of the above statements are correct?

The relationship between the drain current and gate-to-source voltage defines as:

I_D=I_DSS(1-(V_GS / V_p)²

where,

I_D=drain current, I_DSS=maximum saturation current, V_GS=gate to source voltage, V_p=pinch of voltage

drain current, and gate-to-source voltage in JFET are nonlinearly related(option 1 is correct)

In the JFET transistor at V_GS=V_p drain current is zero which is the minimum drain current . (option 2 is correct)

current control devices are the device in which input current control output current or voltage, in BJT transistor base current control collector and emitter current and BJT are known as a current control device.(option 3 incorrect)

Additional Information 

The FET transistors are voltage-controlled devices whereas the BJT transistors are current-controlled devices. The FET transistors have three terminal drains, source, and gate which are equivalent to the collector, emitter, and base terminals in BJT transistors.