Static electricity

• What is static electricity caused by?

  Friction
• What happens when insulating materials are rubbed together?

  • Negatively charged electrons are stripped off
  • They accumulate on one material
  • The other material becomes positively charged
• What occurs to electrons when insulating materials are rubbed together?

  Electrons are stripped off one material
• What is the result of one insulating material losing electrons?

  It becomes positively charged
• How does static electricity build up in insulating materials?

  1. Rubbing materials together
  2. Electrons are transferred
  3. One material becomes negatively charged
  4. The other becomes positively charged
• What happens to electrons in insulating materials during rubbing?

  They are not free to move
• What is the effect of rubbing insulating materials together?

  It creates static electricity
• What are the characteristics of charged objects?

  • Like charges repel
  • Opposite charges attract
  • Charged objects exert forces on each other
• What is the force exerted by charged objects?

  It can be attractive or repulsive
• How do charged objects interact with each other?

  Like charges repel, opposite charges attract
• How can you demonstrate static electricity with a balloon?

  1. Rub the balloon against hair or cloth
  2. The balloon becomes negatively charged
  3. It can attract small paper pieces
• What happens when you rub a balloon on your hair?

  The balloon becomes negatively charged
• Why does a charged balloon stick to a wall?

  It attracts uncharged wall particles
• What happens when a negatively charged balloon is placed near a neutral wall?

  Electrons in the wall are repelled
• What is the principle behind static electricity in everyday objects?

  • Rubbing transfers electrons
  • Creates charge imbalance
  • Results in attraction or repulsion
• What is the result of rubbing two objects together?

  Static electricity is generated
• How does static electricity affect dust particles?

  Charged objects attract dust particles
• What happens to a charged object when it comes close to an uncharged object?

  It can induce a charge in the uncharged object
• How can you use static electricity to pick up small pieces of paper?

  1. Charge a balloon by rubbing it
  2. Bring it close to the paper
  3. The paper will be attracted to the balloon
• What is the effect of static electricity on small objects?

  It can attract or repel them
• Why do charged objects stick to surfaces?

  Due to attraction of opposite charges
• How does the charge of an object affect its interaction with other objects?

  It determines attraction or repulsion
• What are the practical applications of static electricity?

  • Dust removal using charged surfaces
  • Electrostatic painting
  • Photocopiers and laser printers
• What is one application of static electricity in technology?

  Electrostatic painting
• How does static electricity help in dust removal?

  Charged surfaces attract dust particles
• What role does static electricity play in photocopiers?

  It transfers toner to paper
• What are the safety precautions for working with static electricity?

  • Grounding equipment
  • Using antistatic mats
  • Avoiding synthetic clothing
• What is a common safety measure against static electricity?

  Grounding equipment
• Why is grounding important in static electricity?

  It prevents buildup of charge
• How does wearing synthetic clothing affect static electricity?

  It increases the risk of static buildup
• What charge does the balloon have after being rubbed?

  Negative charge
• What happens when you hold the balloon against a wall?

  It sticks to the wall
• Why does the balloon stick to the wall even though the wall isn't charged?

  Because charges on the wall can move slightly
• What is the result of the negative charges on the balloon repelling the negative charges on the wall?

  Positive charge on the wall
• What is the term for the attraction caused by induction when a charged object is near a neutral object?

  Attraction by induction
• What happens to electrons when you run a comb through your hair?

  Electrons are transferred to the comb
• What charge does the comb acquire after running through hair?

  Negative charge
• How can a negatively charged comb pick up small pieces of uncharged paper?

  By inducing a positive charge in the paper
• What is the relationship between static electricity and the potential difference between objects?

  Higher potential difference leads to more static electricity
• What happens when the potential difference between charged objects increases?

  Electrons can jump across gaps