Physics - Fields

Gravitational Field

Force of attraction between masses

Mass

Kg

Weight

N, fg, Mg

Weightless

Lack of a supporting force, a free fall

Galileo expirement

Hammer vs feather… proved that heavy things dont fall faster

Free fall

An idealized motion in which air resistance is neglected and acceleration is constant

Electric field

Space around charged bodies

Direction of field lines

Right and up, positive

Left and down negative

What do electric field lines never do

Cross or tangle

What’s a faraday cage

Meatle box or conductor that keeps electricity outside the cage

Millican

Discovered that only one whole or whole electrons move

The charge of e-

Oolf attracted to the poles of the container depending on the environment ot was in

History of magnetisim

Accidentally found by Shepard's when staff stuck to the rocks in the ground… lodestones

North magnetic and geological magnetic are

Different

Magnetic declination

The discrepancy between the orientation if a compas and true north

Purpose of earth’s magnetic field lines

Protection of charged and cosmic particles

Magnetic domains

Electrons or charges move to the domain it is attracted to

What ate we overdue for

Poles to switch

What causes earth’s magnetism

Moving magma the iron inside it

What did Christian oersted discover

Moving electric charges produce a magnetic field

Left hand rile #1

Figure out the current flow

Fingers are the direction of the field

Thumb points in the current flow

Left hand rule 2

Fingers determine current

Thimb is the north pole

Magnetic field

Force it exerts on a current caring wire