Question

The action of JFET in its equivalent circuit can best be represented as a
(A) Current controlled current source
(B) Current controlled voltage source
(C) Voltage controlled voltage source
(D) Voltage controlled current source

Answer 1

Explanation:

In JFET equivalent circuit, the output current is controlled by the gate to source voltage and hence we can say it is a Voltage controlled current source.

Answer 2

Voltage-controlled current source

Explanation:

• A Source could be a device which converts mechanical, chemical, thermal or another kind of energy into current. In other words, the source is a full of life network element meant for generating power.
• The various forms of sources available within the electrical network are voltage source and current sources. A voltage source features a forcing function of emf whereas the present source incorporates a forcing function of current.
• A voltage source is a two dimensional source where the current at any given time is a constant.
• Such a voltage source is termed a perfect Voltage Source and have zero internal resistance. a perfect current source could be a two-terminal circuit element which supplies the identical current to any load resistance connected across its terminals.
• It's important to stay in mind that the present supplied by this source is independent of the voltage of source terminals. it's infinite resistance.

Therefore, the JEFT in its equivalent is represented as voltage controlled current source.