$$\text { Figure } 10

Question

$$\text { Figure } 10 < 3$$
-If the resistor changes to  2.2 $\mathrm { k } \Omega$  in Figure  10-3 , the new cut off frequency equals
A) 995 Hz 
B) 1.18 kHz 
C) 1.81 kHz 
D) 1.01 kHz

Quizplus · Accepted Answer

The cutoff frequency for a low pass filter is given by:

$$f_c = \frac{1}{2\pi RC}$$

where R is the resistance and C is the capacitance in the circuit.

In Figure 10-3, the original resistor is 1.5kΩ and the cutoff frequency is given as 1.46 kHz.

If the resistor changes to 2.2kΩ, the new cutoff frequency can be found as:

$$f_c = \frac{1}{2\pi (2.2 \mathrm{k}\Omega)(220 \mathrm{nF})} = 1.81 \mathrm{kHz}$$

Therefore, the answer is choice C, 1.81 kHz.

Figure 10<3\text { Figure } 10 < 3 Figure 10<3 -If the Resistor Changes to 2

$\text { Figure } 10 < 3$ -If the Resistor Changes to 2