CH5
What is Electrostatics?
The study of stationary electric charges.
The study of electric charges in motion.
Increasing electric resistance results in______?
A reduced electric current.
_____________ is the ability of material to attract the lines of magnetic field intensity?
Magnetic Permeability.
Electric potential is measured in units of______________?
Joule per coulomb, or volt.
Electrification can be created by ________,______,_______?
contact, friction, or induction.
What is a conductor?
any substance through which electrons can easily flow.
Electrons that flow in only one direction constitute______?
DC, Direct Current.
All matter can be classified according to either of _______________?
four interactions with an external magnetic field.
___________________ is an electric current induced in an electric circuit if some part of that circuit is in a changing magnetic field?
Electromagnetic induction.
unlike charges________, like charges_______?
Unlike charges attract. Like charges repel.
What is an Insulator?
any material that does not allow electrons to flow.
Electrons that flow alternately in opposite directions consitute________?
AC, Alternating Current.
The degree to which a material can be magnetized is it __________?
Magnetic Susceptibility.
_____________ powers the rotating anode of an x-ray tube?
The electric charge of a conductor is______________?
Concentrated along the sharpest curvature of the surface.
A________ is a material that under some conditions behaves as an insulator and in other conditions behaves as a conductor?
Semiconductor.
Any charged particle in motion creates a ________?
Magnetic field.
Ferromagnetic objects can be made into magnets by __________?
Induction.
A____________ changes the intensity of alternating voltage and current?
Transformer.
The unit of electric potential is the_______?
The volt (V)
What is Electromagnetism?
Describes how electrons are given their electric potential. Electrons in motion create their magnetism.
The imaginary lines of a magnetic field are always a __________?
Closed Loop.
Any charge in motion induces a ___________?
Magnetic field.
The___________ has one winding and caries both voltage and current?
The Autotransformer.