Static Electricity Concepts and Applications

The video tutorial explains static electricity concepts using a worksheet. It covers how charges are distributed on a rod and cloth, the process of charging objects, and demonstrates experiments like using a goldleaf electroscope. The tutorial also discusses interactions between a balloon and hair, and a polythene rod with a dry cloth, explaining electron transfer and charge distribution. The video concludes with a summary of the worksheet.

What does Figure 8.1 demonstrate about the charges on the rod and cloth?

• The rod is positively charged while the cloth is negatively charged.

• The rod has more positive charges than the cloth.

• The cloth has more negative charges than the rod.

• Both the rod and cloth have equal positive and negative charges.

What happens to the charges when a plastic rod is rubbed with a cloth?

• Electrons move from the rod to the cloth.

• Electrons move from the cloth to the rod.

• Protons move from the rod to the cloth.

• Protons move from the cloth to the rod.

Which device can be used to demonstrate that a plastic rod is charged?

• A voltmeter

• A goldleaf electroscope

• A thermometer

• A barometer

What happens to the gold leaf in a goldleaf electroscope when a charged rod is brought near?

• The gold leaf remains stationary.

• The gold leaf attracts to the rod.

• The gold leaf deflects away from the rod.

• The gold leaf changes color.

What is the effect of a positively charged rod on an uncharged metal piece?

• The metal piece becomes positively charged.

• The metal piece becomes negatively charged at the top.

• The metal piece becomes neutral.

• The metal piece remains uncharged.

What happens to the charges on a metal piece when connected to the earth wire?

• The top part becomes positive.

• The bottom part becomes neutral.

• The entire piece becomes negative.

• The entire piece becomes positive.

How does rubbing a balloon on hair cause it to become negatively charged?

• Electrons move from the balloon to the hair.

• Protons move from the hair to the balloon.

• Electrons move from the hair to the balloon.

• Protons move from the balloon to the hair.

Why is it important for the balloon to be made of an electrical insulator?

• To make the balloon heavier.

• To change the color of the balloon.

• To prevent electrons from flowing away.

• To allow electrons to flow easily.

What is one practical use of static electricity?

• Cooling electronic devices.

• Heating homes during winter.

• Reducing pollution with electrostatic precipitators.

• Generating electricity in power plants.

What happens to the stream of water when a charged rod is brought near it?

• The stream of water bends towards the rod.

• The stream of water bends away from the rod.

• The stream of water stops flowing.

• The stream of water changes color.