Definitions Flashcards
Coulombs law
The magnitude of the electrostatic force exerted by one point charge and is directly proportional to the product of the charges and inversely proportional to the square of the distance between them.
Electric field
the electric field that exist at a point is the electrostatic force experienced by a small charge itself.
Ohms law
At constant temperature the potential difference across a conductor id directly proportional to the current strength in the conductor
electrostatics
Study of a charge at rate
First property of charge: charged is conserved. Law of conservation
The net charge of an isolated system remains constant. alternatively the electric charge can either be created or destroyed.
Second property of charge: charges can be positive or negative
Like charges repel each other and unlike charges attract each other.
Third charge property: charge can be quantized.
The charge can only have values that are integral multiples of the fundamental charge.
Forth property of charge: charges can be induced
A method of “creating” or generating static electricity in a material by brining an electrically charged object near it.
Fifth property of charge: A charge can be polarized.
Polarization occurs when an electric field distorts the negative cloud of electrons around positive atomic nuclei in a direction opposite the field.
Electrical conductors
Substances that readily conduct electric charge
Electric insulators
Materials that conduct electric charge poorly
direction of charge: towards
attractive force point TOWARDS the charge exerting force
Direction of charge: Away
A repulsive force points AWAY from the charge exerting force.
Electric field lines
provide a map of the electric field in the space surrounding electric charges. always directed away from the positive charge and towards the negative charge
Electric dipole arragment
The number of lines leaving a positive charge or entering a negative charge is proportional to the magnitude of the charge