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Circuits using generators and cells and capacitors [closed]

This question was in a science worksheet we had, the description read as follows: Tim has designed a generator that uses wind power and provides 9V. He decides to design a circuit using diodes ...
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matching game with light or buzzer [closed]

My students made a matching game that matches states with governors. We can make it light up if they get the question right. How do we make it sound a buzzer when the answer is wrong?