physics -static electricity

what are the types of electric charge

positive charge and negative charge

when ar eelectric charges attractive or repulsive?

like charges repel

unllike charges attract

how do you charge a conducter by induction

1. bring a negatively charged rod near ,but not touching,the conducter

2. keeping the charged rod in place , earth the conductor by touching by touching it with your finger

3. remove your finger and then the rod

4. the conductor will be positively charged

where does static charge reside 

all static charge resides on the outside surface of a conducter

it tends to reside in the area where the conducter is most pointed

what is coulombs law of force

the force of attraction between two forces is:

• directly proportional to the product of the charges 

• inversly proportional to the square of the distance between them

what is an electric field

an electric field is any region of space where a static electric charge experiences a force other than the force of gravity

what is an electric field line

a line drawn in an electric field such that the tangent to it at any point is along the direction of the force on a positive charge placed at any point

describe an experiment to demonstrate electric field strength

connect a high voltage source to the metal plates which are in the oil

the semolina portions line up in the direction of the field strength,showing electic field pattern

what is electric field strength

the electric field strength at a point is the force per unit charge at that point