Final answer:
The voltage ripple in a buck converter will decrease if the switching frequency is increased from 71 kHz to 200 kHz, but without the exact formula for ripple in relation to frequency, the precise new ripple value cannot be determined.
Step-by-step explanation:
The voltage ripple in a buck converter is inversely proportional to the switching frequency. If the switching frequency increases, the voltage ripple decreases. Given that the initial ripple at 71 kHz is 7.3%, when the frequency is increased to 200 kHz, which is approximately 2.82 times the original frequency, the ripple percentage will decrease accordingly. However, without the exact relationship or formula for the ripple versus frequency (which is usually a complex function of inductance, capacitance, load, and frequency), the exact new ripple value cannot be determined definitively. Generally, if all other conditions remain constant, increasing the switching frequency reduces the output voltage ripple due to the decreased energy storage requirements for the inductor and capacitor per cycle.