Figure 1 Assume r e ' = 15 ▲.
-Refer to Figure 1. What value of RL will produce a cutoff frequency due to C3 of 25 Hz?
A)19 k▲
B)8.8 k▲
C)24 k▲
D)14 k▲

Question

Figure 1 Assume r e ' = 15 ▲.
-Refer to Figure 1. What value of RL will produce a cutoff frequency due to C3 of 25 Hz?
A)19 k▲ 
B)8.8 k▲ 
C)24 k▲ 
D)14 k▲

Quizplus · Accepted Answer

The cutoff frequency $f_c$ for a high-pass or low-pass filter can be calculated using the formula $f_c = \frac{1}{2\pi RC}$. Given that the desired cutoff frequency is 25 Hz and assuming C3 is known, we can rearrange the formula to solve for R (which represents $R_L$ in this context). Without the specific value of C3 provided, the correct answer is determined by the context of the question, which suggests that an understanding of the relationship between resistance, capacitance, and cutoff frequency is needed. Given the options, the correct resistance value that would yield a cutoff frequency of 25 Hz with a specific capacitance is provided in the choices. The selection of 8.8 kΩ as the correct answer implies that it is the resistance value that, when used in the formula with the given or implied capacitance value, results in a 25 Hz cutoff frequency.

Figure 1 Assume Re' = 15 ▲

Figure 1 Assume R_e' = 15 ▲