Figure 1
-Refer to Figure 1. To calculate the input resistance looking in at Vin, dc sources are replaced with
A)the bias resistors
B)a ground
C)an open
D)the ac emitter resistance

Question

Figure 1
-Refer to Figure 1. To calculate the input resistance looking in at Vin, dc sources are replaced with
A)the bias resistors 
B)a ground 
C)an open 
D)the ac emitter resistance

Quizplus · Accepted Answer

When calculating input resistance in the context of DC analysis, DC sources (such as batteries or DC voltage supplies) are replaced with a ground. This is because a DC source is considered a short circuit in DC analysis, effectively becoming a ground (0V) in the circuit.

Figure 1 -Refer to Figure 1. to Calculate the Input Resistance Looking