What is the term for the frequency at which attenuation begins to rise rapidly in a filter?

What is the term for the frequency at which attenuation begins to rise rapidly in a filter?

• A. Ripple amplitude
• B. Reverse bias
• C. Power Supply Circuits
• D. Cutoff Frequency

Answer: (D)

The term describes the frequency where the filter begins to reject more strongly, causing attenuation to rise rapidly as frequency increases. This point is called the cutoff frequency. In many designs, it's defined at the -3 dB point, where the output falls to about 70.7% of the input, marking the transition from the passband to the stopband. The other terms don’t fit this idea: ripple amplitude refers to variations in the passband, reverse bias is a diode term, and Power Supply Circuits are unrelated to the filter’s frequency behavior. So the correct term is cutoff frequency.

The term describes the frequency where the filter begins to reject more strongly, causing attenuation to rise rapidly as frequency increases. This point is called the cutoff frequency. In many designs, it's defined at the -3 dB point, where the output falls to about 70.7% of the input, marking the transition from the passband to the stopband. The other terms don’t fit this idea: ripple amplitude refers to variations in the passband, reverse bias is a diode term, and Power Supply Circuits are unrelated to the filter’s frequency behavior. So the correct term is cutoff frequency.