Virtual Labs

Output Characteristics of n-channel JFET

1. What is the typical shape of the output characteristic curve for an n-channel JFET?

a: Linear Explanation

Explanation

b: Parabolic Explanation

Explanation

c: Hyperbolic Explanation

Explanation

d: Exponential Explanation

Explanation

2. In the ohmic region of an n-channel JFET, the device behaves like a:

a: Current source Explanation

Explanation

b: Voltage source Explanation

Explanation

c: Resistor Explanation

Explanation

d: Capacitor Explanation

Explanation

3. What happens to the drain current (I_D) when the gate-source voltage (V_GS) is made more negative?

a: I_D increases Explanation

Explanation

b: I_D decreases Explanation

Explanation

c: I_D remains constant Explanation

Explanation

d: I_D oscillates Explanation

Explanation

4. What is the pinch-off voltage (V_P) in an n-channel JFET?

a: The voltage at which the channel is fully open Explanation

Explanation

b: The voltage at which the channel is fully closed Explanation

Explanation

c: The voltage at which the drain current starts to decrease Explanation

Explanation

d: The voltage at which the gate-source junction becomes forward biased Explanation

Explanation

5. In which region of an n-channel JFET is the drain current (I_D) relatively independent of the drain-source voltage (V_DS)?

a: Ohmic region Explanation

Explanation

b: Saturation region Explanation

Explanation

c: Cutoff region Explanation

Explanation

d: Breakdown region Explanation

Explanation

6. What is the primary factor controlling the drain current (I_D) in the saturation region of an n-channel JFET?

a: Drain-source voltage (V_DS) Explanation

Explanation

b: Gate-source voltage (V_GS) Explanation

Explanation

c: Temperature Explanation

Explanation

d: Channel length Explanation

Explanation

7. How does the transconductance (g_m) of an n-channel JFET vary with the gate-source voltage (V_GS)?

a: Increases linearly Explanation

Explanation

b: Decreases linearly Explanation

Explanation

c: Increases exponentially Explanation

Explanation

d: Decreases exponentially Explanation

Explanation

8. What is the relationship between the drain current (I_D) and the gate-source voltage (V_GS) in the saturation region for an n-channel JFET?

a: I_D is directly proportional to V_GS Explanation

Explanation

b: I_D is inversely proportional to V_GS Explanation

Explanation

c: I_D is proportional to the square of (V_GS - V_P) Explanation

Explanation

d: I_D is proportional to the exponential of V_GS Explanation

Explanation

9. What is the effect of temperature on the output characteristics of an n-channel JFET?

a: Increases I_D Explanation

Explanation

b: Decreases I_D Explanation

Explanation

c: No effect on I_D Explanation

Explanation

d: Causes I_D to oscillate Explanation

Explanation

10. In an n-channel JFET, when the gate-source voltage (V_GS) is zero, the device operates in which region?

a: Ohmic region Explanation

Explanation

b: Saturation region Explanation

Explanation

c: Cutoff region Explanation

Explanation

d: Breakdown region Explanation

Explanation