Which of the following statements are true regarding the DC load line?

a) It is a straight line drawn between I_C and V_CE.

b) The quiescent point lies on the load line.

c) In the DC load line, when the collector emitter voltage V_CE = 0, the collector current is maximum.

DC Load Line in a Transistor Circuit:

The DC load line is an important concept in transistor circuits, representing all possible combinations of collector-emitter voltage (V_CE) and collector current (I_C) for a given load resistance (R_L) with a fixed power supply (V_CC). Let's analyze the given statements:

a) It is a straight line drawn between I_C and V_CE.

• This statement is true. The DC load line is a straight line on the I_C-V_CE plane, representing the relationship between the collector current and the collector-emitter voltage for a fixed load resistance and supply voltage.

b) The quiescent point lies on the load line.

• This statement is true. The quiescent point (Q-point) represents the DC operating point of the transistor, where the transistor operates in the absence of an input signal. This point lies on the DC load line.

c) In the DC load line, when the collector-emitter voltage V_CE = 0, the collector current is maximum.

• This statement is true. When V_CE = 0, the entire supply voltage (V_CC) drops across the load resistance (R_L), resulting in the maximum collector current (I_C). This maximum current is given by I_C = V_CC / R_L.

Conclusion:

All the given statements are true regarding the DC load line:

a) It is a straight line drawn between I_C and V_CE.

b) The quiescent point lies on the load line.

c) In the DC load line, when the collector-emitter voltage V_CE = 0, the collector current is maximum.