Charging By Contact Flashcards
What are the two main ways that neutral objects can become charged?
Friction or conduction
When does charging by friction occur?
When two different neutral materials are rubbed together or come in contact and electric charges are transferred from one to the other
Why do charged objects tend to lose their charges faster in the summer?
Because there is more water vapour so water molecules collide with the object transferring electrons from the object to the molecules
Why do charged objects tend not to lose their charge in the winter?
Because there are less molecules to collide with the charged object
What is “ a list of materials arranged in order of their tendency to gain electrons “ ?
An electrostatic series
If two objects from an electrostatic series are rubbed together, what happens to the material listed higher on the list and what happens to the material listed lower on the list?
Higher- will lose electrons and become positively charged
Lower- will gain electrons and become negatively charged
When does charging objects by condition occur?
When two objects with different amounts of electric charge come in contact and electrons move from one object to the other
Where do electrons move when objects are charged by conduction?
ALWAYS from the object with a larger negative charge to the object with a smaller negative charge. (Less positive to more positive)
What does grounding an object involve?
Removing the excess charge by transferring electrons between the object and a large neutral object such as Earth
When a positively charged object is grounded, where do the electrons go?
Travel from the ground to the object until it is neutral
When a negatively charged object is grounded, where do the electrons go?
Travel from the object into the ground until it is neutral
