How many volts of static electricity can build up in the aircraft windscreen?

The correct answer to how many volts of static electricity can build up in the aircraft windscreen is 100,000 volts. This high level of voltage is due to the nature of airflow over the surfaces of the aircraft during flight. As the aircraft moves through the air, friction between the air and the windscreen can lead to the accumulation of static charges.

Windscreens are particularly susceptible to this phenomenon because they are typically made of materials that can easily build up static charges, and the continuous movement at high speeds enhances this effect. It is vital for aviation safety to be aware of such static build-up, as it can affect navigation instruments and communication systems if not properly managed.

Static electricity can be discharged in various ways, and knowing the magnitude of potential charges can help maintenance and flight crews take necessary precautions to mitigate any safety risks associated with static discharge during pre-flight checks or handling.