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Static Electricity
| Question | Answer |
|---|---|
| What material becomes negatively charged when rubbed? | Polythene |
| What material becomes positively charged when rubbed? | Cellulose acetate |
| What is a conductor? | A substance through which electric charge may flow |
| What is an insulator? | A substance through which electric charge cannot flow |
| Where does static charge accumulate? | Where the conductor is most pointed |
| State Coulomb's law. | The point of attraction or repulsion between two points is directly proportionate to the product of the charges and inversely proportionate to the square of the distance between them. |
| What is an electric field? | Any region of space where a static electric charge experiences a force other than gravity |
| What is the line of force? | A line drawn showing the direction of the force |
| Name three applications of electric fields. | Photocopying, electrostatic precipitators, and damaging integrated circuits |
| Define electric field strength. | The force per unit charge at a given point |
| What is the unit of electric field strength? | Newton per coulomb/ Volt per meter |