Lesson 1
Cards (21)
- Objects become electrically charged either by gaining or losing electrons.
- It is a translucent yellowish resin rubbed with a piece of cloth attracts nearby objects.
- It is a study of all phenomena associated with electric charges at rest.
- What is the unit for charge?
- It is the measure of the ease at which an electric charge moves through a material.
- Are materials that allow the flow of charges through them.
- Have plenty of free electrons that can easily move in the materials.
- Are materials that resist the flow of charges.
- Intermediate between conductors and insulators.
- Refers to atoms of different elements in very small amounts added to pure semiconductors to improve conductivity.
- Only work at temperatures close to absolute zero.
- What is the highest known critical temperature of a superconducting material?
- What is the effect of two negatively charged objects coming near each other?
- What is the effect of one negatively charged object and one positively charged object coming close to each other?
- What is the unbalanced charge on an object?
- An object with a negative charge will be most strongly attracted to?
- What is the charge of the electron?
- Ms Jo rubbed two balloons with a piece of wool. What will happen when the balloons are brought near each other?
- The accumulation of excess electric charge on an object is called?
- If a substance has an excess number of electrons on its surface, what type of charge does it have?
- If an object has the same number of positive and negative charges, its electrical charge is?