ASPC Quiz 13

what is magnetism?

what is magnetism?

the phenomena associated with magnetic fields which arise from the motion in electric charge

what is a field?

a region in which a force acts

what causes and is effected by a gravitational field?

mass; mass and electromagnetic radiation

what causes and is effected by an electric field?

charge; charges

what causes and is effected by a magnetic field?

magnets and current carrying wire; magnets and current carrying wire and ferrous metals

what is the purpose of field line diagrams?

we cannot actually see them so we use them to depict what the particles are doing

how are magnetic and electric fields related?

a changing electric field creates a magnetic field and vice versa

what does the right hand rule demonstrate?

it shows the direction of thrust, magnetic field, and induced current

what are the four main laws of magnetism?

Ampere’s, Faraday’s, Lorentz’s, and Lenz’s

what is Ampere’s law?

says when a current is flowing through a wire a magnetic field is created around it and the strength of a field is increased as the current increases

what is Faraday’s law?

if a changing magnetic flux is passing through a coil of wire, a current is induced

what are three real world examples of magnetism?

solenoids, generators, and mag-lev trains

how do solenoids work?

a long tightly wound coil of wire where electric current can flow which creates a magnetic field

how do generators work?

by forcing electrons from an external source through an electrical circuit it converts the power of motion into electrical energy

how do mag-lev trains work?

the tracks’ magnets repel the bottom of the trains and alternating charges along the track propel the train forwards

what two principles came together to help us understand gravitational fields?

newton’s second law and kepler’s laws of planetary motion

how do newton’s second law and kepler’s laws of planetary motion apply to understanding magnetism

Kepler’s laws talk about the planets elliptical shape, the amount of space and time in an orbit and how its period is proportional to the orbit and newtons law talks about forces being equal to mass times acceleration, which help us understand how gravity is pulling us, and how the planets shape affects the planets gravity.