Final answer:
The statement that the gate current in a JFET is normally zero is true. JFETs are controlled by the gate voltage, not the gate current, due to the high input impedance of the gate.
Step-by-step explanation:
The statement that the gate current in a Junction Field-Effect Transistor (JFET) is normally zero is true. A JFET is designed to control the flow of current with an electric field generated by the voltage applied to its gate terminal. Since the gate is reverse-biased, ideally no current flows into it. The device is effectively controlled by the gate voltage rather than the gate current, which is one reason for their usefulness in circuits where power conservation is important. This phenomenon is due to the high input impedance of the gate, which prevents current from flowing into this terminal under normal operating conditions. However, leakage currents can occur due to imperfections, but these are typically negligible.