Electric Fields Flashcards
0
Q
What is a point charge?
A
All charge is concentrated at the centre.
1
Q
What are the field lines defined for in an electric field?
A
A positive test charge.
2
Q
What is Coulombs Law?
A
Two charged objects will exert a (repulsive or attractive) force on one another that is inversely proportional to the square of the distances between them.
3
Q
What does the Shuttling Ball experiment show and how?
A
Shows that electric current is the flow of charge.
Shuttling ball completes the circuit between two plates.
4
Q
What is the Gold Leaf Electroscope used for?
A
Used to detect charge. Stem and leaf gain same type of charge and the leaf rises (repelled)
5
Q
Define the electric potential at a point.
A
The work done per unit charge to move a test charge from infinity to that point.
