Tapping a piezo buzzer gives an interesting waveform, with a voltage spike followed by an envelope, and then a negative rebound voltage.

If that wasn’t good enough for you, here’s a 9-year old throwing it in from beyond half court. And here’s a kid banking in a semi-alley-oop 3-point buzzer beater.

Heidi Klum, impressed with the nine year old, Indian-origin girl, Pranysqa Mishra, gave her a golden buzzer and rushed to the stage to give her a hug.

Although piezoelectric buzzers generate sound waves when you apply an ac voltage, you can use them in the opposite way: You obtain the maximum ac peak voltage that the piezoelectric buzzer generates ...

When the Morse key was held down the buzzer buzzed, the current pulsed to the transformer which stepped up the voltage to several hundred volts producing a nice bright spark. The radio waves ...

When storing 9-volt batteries, Baker said it is best to keep them in the original packaging until you are ready to use them around the house. Officials have also said to store batteries standing up.

Learn about the roles of each component in an electrical circuit with these interactive learning resources for KS2 Science students aged 7-11 from BBC Bitesize.

Previously, Klum pressed the Golden Buzzer for 13-year-old singer Angelina Green. Mandel chose his Golden Buzzer recipient, 16-year-old Christian Guardino.

When an America's Got Talent judge presses the Golden Buzzer for a performer, the contestant often breaks down in happy tears and gold confetti descends from above. The show introduced this ...