Applications and Hazards of Static Electricity

The video explores the applications and hazards of electrostatic charging. It explains how insulators become charged through electron transfer and discusses applications like spray painting, inkjet printers, photocopiers, electrostatic precipitators, and insecticide sprays. The video also highlights the dangers of electrostatic charges, particularly during the refueling of aircraft, and emphasizes the importance of grounding to prevent accidents.

What happens when two insulators are rubbed together?

• They both become positively charged.

• One becomes positively charged and the other negatively charged.

• They both become negatively charged.

• They remain neutral.

In spray painting, why are paint particles attracted to the object being painted?

• The paint particles are neutral.

• The paint particles and the object have the same charge.

• The paint particles are positively charged and the object is negatively charged.

• The paint particles are negatively charged and the object is positively charged.

How do inkjet printers use electrostatic charges?

• To heat the ink.

• To deflect ink droplets using charged plates.

• To dry the ink quickly.

• To mix different colors of ink.

What role do negatively charged toner particles play in photocopiers?

• They create the image on the glass plate.

• They erase the image from the glass plate.

• They neutralize the glass plate.

• They clean the glass plate.

What is the purpose of an electrostatic precipitator?

• To charge smoke particles positively.

• To increase the temperature of waste gases.

• To add moisture to waste gases.

• To remove smoke and soot particles from waste gases.

How do insecticide sprays benefit from electrostatic charges?

• They become heavier and fall faster.

• They adhere better to crops and the ground.

• They evaporate more quickly.

• They change color.

Why is grounding important when refueling aircraft?

• To cool down the fuel.

• To prevent the buildup of electrostatic charge.

• To reduce fuel consumption.

• To increase the speed of refueling.